Add Ticker24h support: hourly market snapshots with USD-normalized volume filtering

2026-04-26 18:39:52 -04:00
parent 85fcbe1330
commit 0178b5d29d
45 changed files with 1995 additions and 170 deletions
--- a/doc/plan.md
+++ b/doc/plan.md
@@ -1,7 +1,8 @@
 # Development Plan

-* Realtime data
+* Daily volume in symbol metadata
 * Triggers
+* Screeners
 * Strategy UI
 * Backtesting TV integration
 * Paper Trading
--- a/flink/src/main/java/com/dexorder/flink/TradingFlinkApp.java
+++ b/flink/src/main/java/com/dexorder/flink/TradingFlinkApp.java
@@ -16,6 +16,12 @@ import com.dexorder.flink.publisher.RealtimeBarFunction;
 import com.dexorder.flink.publisher.RealtimeBarPublisher;
 import com.dexorder.flink.publisher.TickWrapper;
 import com.dexorder.flink.publisher.TickDeserializer;
+import com.dexorder.flink.quotes.Ticker24hFunction;
+import com.dexorder.flink.quotes.Ticker24hPublisher;
+import com.dexorder.flink.quotes.Ticker24hScheduler;
+import com.dexorder.flink.quotes.Ticker24hWrapper;
+import com.dexorder.flink.quotes.TickerBatchDeserializer;
+import com.dexorder.flink.quotes.TickerBatchWrapper;
 import com.dexorder.flink.sink.HistoricalBatchWriter;
 import com.dexorder.flink.sink.SymbolMetadataWriter;
 import com.dexorder.flink.zmq.ZmqChannelManager;
@@ -273,6 +279,35 @@ public class TradingFlinkApp {
            LOG.info("Realtime tick pipeline configured: market-tick → OHLC bars → clients (periods={})",
                    java.util.Arrays.toString(periods));

+            // Ticker24h pipeline: market-ticker Kafka → QuoteCurrencyIndex → ZMQ XPUB
+            KafkaSource<TickerBatchWrapper> tickerSource = KafkaSource.<TickerBatchWrapper>builder()
+                    .setBootstrapServers(config.getKafkaBootstrapServers())
+                    .setTopics(config.getKafkaTickerTopic())
+                    .setGroupId("flink-ticker24h-consumer")
+                    .setStartingOffsets(OffsetsInitializer.latest())
+                    .setValueOnlyDeserializer(new TickerBatchDeserializer())
+                    .build();
+
+            DataStream<TickerBatchWrapper> tickerBatchStream = env
+                    .fromSource(tickerSource, WatermarkStrategy.noWatermarks(), "TickerBatch Kafka Source");
+
+            DataStream<Ticker24hWrapper> ticker24hStream = tickerBatchStream
+                    .flatMap(new Ticker24hFunction())
+                    .setParallelism(1)
+                    .name("Ticker24hFunction");
+
+            ticker24hStream.addSink(new Ticker24hPublisher(notificationEndpoint))
+                    .setParallelism(1)
+                    .name("Ticker24hPublisher");
+
+            LOG.info("Ticker24h pipeline configured: market-ticker → Ticker24hFunction → clients");
+
+            // Start Ticker24h scheduler (fires on startup + hourly for all configured exchanges)
+            Ticker24hScheduler ticker24hScheduler = new Ticker24hScheduler(
+                    broker, config.getSupportedExchanges());
+            ticker24hScheduler.start();
+            LOG.info("Ticker24hScheduler started for exchanges: {}", config.getSupportedExchanges());
+
            // TODO: Set up CEP patterns and triggers

            LOG.info("Flink job configured, starting execution");
@@ -281,6 +316,7 @@ public class TradingFlinkApp {
            Runtime.getRuntime().addShutdownHook(new Thread(() -> {
                LOG.info("Shutting down Trading Flink Application");
                try {
+                    ticker24hScheduler.stop();
                    notificationForwarder.close();
                    subscriptionManager.stop();
                    broker.stop();
--- a/flink/src/main/java/com/dexorder/flink/config/AppConfig.java
+++ b/flink/src/main/java/com/dexorder/flink/config/AppConfig.java
@@ -4,7 +4,10 @@ import org.yaml.snakeyaml.Yaml;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;

 /**
@@ -136,6 +139,26 @@ public class AppConfig {
        return getString("kafka_ohlc_topic", "market-ohlc");
    }

+    public String getKafkaTickerTopic() {
+        return getString("kafka_ticker_topic", "market-ticker");
+    }
+
+    /**
+     * Comma-separated list of exchange IDs to fetch Ticker24h snapshots for.
+     * Default: BINANCE only.
+     */
+    public List<String> getSupportedExchanges() {
+        String raw = getString("supported_exchanges", "BINANCE");
+        List<String> result = new ArrayList<>();
+        for (String part : raw.split(",")) {
+            String trimmed = part.trim().toUpperCase();
+            if (!trimmed.isEmpty()) {
+                result.add(trimmed);
+            }
+        }
+        return result;
+    }
+
    // Notification config:
    // Task managers PUSH notifications to this endpoint (job manager PULL address)
    public String getNotificationPublishEndpoint() {
--- a/flink/src/main/java/com/dexorder/flink/ingestor/IngestorBroker.java
+++ b/flink/src/main/java/com/dexorder/flink/ingestor/IngestorBroker.java
@@ -61,6 +61,8 @@ public class IngestorBroker implements AutoCloseable {
    private static final long HEARTBEAT_TIMEOUT_MS = 25_000;
    /** Re-queue historical job if not completed within this window (ms) */
    private static final long HISTORICAL_TIMEOUT_MS = 120_000;
+    /** Re-queue ticker snapshot job if not completed within this window (ms) */
+    private static final long TICKER_SNAPSHOT_TIMEOUT_MS = 30_000;

    private final ZmqChannelManager zmqManager;
    private volatile boolean running;
@@ -113,6 +115,23 @@ public class IngestorBroker implements AutoCloseable {
        LOG.info("IngestorBroker stopped");
    }

+    /**
+     * Submit a TICKER_SNAPSHOT request from outside the broker thread (thread-safe).
+     * Called by Ticker24hScheduler on startup and hourly.
+     * Uses sentinel ticker "@TICKER24H.{EXCHANGE}" (e.g., "@TICKER24H.BINANCE").
+     */
+    public void submitTicker24hRequest(String exchange) {
+        String jobId = UUID.randomUUID().toString();
+        DataRequest request = DataRequest.newBuilder()
+                .setRequestId(jobId)
+                .setJobId(jobId)
+                .setType(DataRequest.RequestType.TICKER_SNAPSHOT)
+                .setTicker("@TICKER24H." + exchange.toUpperCase())
+                .build();
+        externalSubmissions.add(request);
+        LOG.info("Enqueued TICKER_SNAPSHOT request: exchange={}, jobId={}", exchange, jobId);
+    }
+
    /**
     * Submit a realtime data request from outside the broker thread (thread-safe).
     * Called by RealtimeSubscriptionManager when subscription ref count goes 0→1.
@@ -219,21 +238,38 @@ public class IngestorBroker implements AutoCloseable {
        try {
            SubmitHistoricalRequest req = SubmitHistoricalRequest.parseFrom(payload);
            String jobId = UUID.randomUUID().toString();
-            DataRequest dataRequest = DataRequest.newBuilder()
+            String ticker = req.getTicker();
+            String clientId = req.hasClientId() ? req.getClientId() : "";
+
+            DataRequest dataRequest;
+            if (ticker.startsWith("@TICKER24H.")) {
+                // Client-initiated ticker snapshot — route to TICKER_SNAPSHOT, not OHLC
+                dataRequest = DataRequest.newBuilder()
+                        .setRequestId(req.getRequestId())
+                        .setJobId(jobId)
+                        .setType(DataRequest.RequestType.TICKER_SNAPSHOT)
+                        .setTicker(ticker)
+                        .setClientId(clientId)
+                        .build();
+                LOG.info("Routing client-initiated TICKER_SNAPSHOT: request_id={}, ticker={}, client_id={}",
+                        req.getRequestId(), ticker, clientId);
+            } else {
+                dataRequest = DataRequest.newBuilder()
                        .setRequestId(req.getRequestId())
                        .setJobId(jobId)
                        .setType(DataRequest.RequestType.HISTORICAL_OHLC)
-                    .setTicker(req.getTicker())
+                        .setTicker(ticker)
                        .setHistorical(com.dexorder.proto.HistoricalParams.newBuilder()
                                .setStartTime(req.getStartTime())
                                .setEndTime(req.getEndTime())
                                .setPeriodSeconds(req.getPeriodSeconds())
                                .build())
-                    .setClientId(req.hasClientId() ? req.getClientId() : "")
+                        .setClientId(clientId)
                        .build();
-            enqueueJob(dataRequest);
                LOG.info("Received historical request from relay: request_id={}, ticker={}",
-                    req.getRequestId(), req.getTicker());
+                        req.getRequestId(), ticker);
+            }
+            enqueueJob(dataRequest);
        } catch (Exception e) {
            LOG.error("Failed to parse SubmitHistoricalRequest from relay", e);
        }
@@ -411,8 +447,14 @@ public class IngestorBroker implements AutoCloseable {

        for (Map.Entry<String, ActiveJob> entry : activeJobs.entrySet()) {
            ActiveJob job = entry.getValue();
-            long timeout = job.type == DataRequest.RequestType.REALTIME_TICKS
-                    ? HEARTBEAT_TIMEOUT_MS : HISTORICAL_TIMEOUT_MS;
+            long timeout;
+            if (job.type == DataRequest.RequestType.REALTIME_TICKS) {
+                timeout = HEARTBEAT_TIMEOUT_MS;
+            } else if (job.type == DataRequest.RequestType.TICKER_SNAPSHOT) {
+                timeout = TICKER_SNAPSHOT_TIMEOUT_MS;
+            } else {
+                timeout = HISTORICAL_TIMEOUT_MS;
+            }
            if (now - job.lastHeartbeat > timeout) {
                timedOut.add(entry.getKey());
            }
@@ -460,7 +502,8 @@ public class IngestorBroker implements AutoCloseable {
            boolean exchangeMatch = exchange.isEmpty() || slot.exchange.equals(exchange);
            boolean typeMatch = slot.slotType == SlotType.ANY
                    || (slot.slotType == SlotType.HISTORICAL
-                            && requestType == DataRequest.RequestType.HISTORICAL_OHLC)
+                            && (requestType == DataRequest.RequestType.HISTORICAL_OHLC
+                                || requestType == DataRequest.RequestType.TICKER_SNAPSHOT))
                    || (slot.slotType == SlotType.REALTIME
                            && requestType == DataRequest.RequestType.REALTIME_TICKS);
            if (exchangeMatch && typeMatch) {
--- a/flink/src/main/java/com/dexorder/flink/ingestor/RealtimeSubscriptionManager.java
+++ b/flink/src/main/java/com/dexorder/flink/ingestor/RealtimeSubscriptionManager.java
@@ -19,17 +19,21 @@ import java.util.regex.Pattern;
 * must go through {@link #enqueuePublish(byte[]...)} so they are sent from the single loop
 * thread — ZMQ sockets are not thread-safe.
 *
- * Topic format: {@code {ticker}|ohlc:{period_seconds}}
- * Example:      {@code BTC/USDT.BINANCE|ohlc:60}
+ * Topic formats:
+ *   Closed bars: {@code {ticker}|ohlc:{period_seconds}}         (strategies, existing consumers)
+ *   Open bars:   {@code {ticker}|ohlc:{period_seconds}:open}    (chart, live price updates)
+ *
+ * Both topic forms map to the same underlying ingestor activation for that ticker.
 *
 * Reference counting:
- *   tickerRefs — across all periods for a ticker; 0→1 triggers ingestor activation
- *   topicRefs  — per (ticker, period); consulted by RealtimeOHLCPublisher to filter output
+ *   tickerRefs — across all subscribed topics for a ticker; 0→1 triggers ingestor activation
+ *   topicRefs  — per topic string; consulted by RealtimeOHLCPublisher to filter output
 */
 public class RealtimeSubscriptionManager implements AutoCloseable {
    private static final Logger LOG = LoggerFactory.getLogger(RealtimeSubscriptionManager.class);

-    private static final Pattern TOPIC_PATTERN = Pattern.compile("^(.+)\\|ohlc:(\\d+)$");
+    // Matches both "{ticker}|ohlc:{period}" and "{ticker}|ohlc:{period}:open"
+    private static final Pattern TOPIC_PATTERN = Pattern.compile("^(.+)\\|ohlc:(\\d+)(:open)?$");

    private final ZmqChannelManager zmqManager;
    private final ZMQ.Socket xpubSocket;
--- a/flink/src/main/java/com/dexorder/flink/publisher/RealtimeBar.java
+++ b/flink/src/main/java/com/dexorder/flink/publisher/RealtimeBar.java
@@ -3,8 +3,11 @@ package com.dexorder.flink.publisher;
 import java.io.Serializable;

 /**
- * A single completed OHLC bar for a given ticker and period.
+ * A single OHLC bar for a given ticker and period.
 * Output type of RealtimeBarFunction, input type of RealtimeBarPublisher.
+ *
+ * isClosed=true  → window fully closed; published on topic "{ticker}|ohlc:{period}"
+ * isClosed=false → window still open (snapshot); published on "{ticker}|ohlc:{period}:open"
 */
 public class RealtimeBar implements Serializable {
    private static final long serialVersionUID = 1L;
@@ -23,11 +26,14 @@ public class RealtimeBar implements Serializable {
    private long volume;
    /** Number of ticks in this window */
    private int tickCount;
+    /** True if this bar's time window has fully closed; false if still accumulating. */
+    private boolean isClosed;

    public RealtimeBar() {}

    public RealtimeBar(String ticker, int periodSeconds, long windowStartMs,
-                       long open, long high, long low, long close, long volume, int tickCount) {
+                       long open, long high, long low, long close, long volume, int tickCount,
+                       boolean isClosed) {
        this.ticker = ticker;
        this.periodSeconds = periodSeconds;
        this.windowStartMs = windowStartMs;
@@ -37,6 +43,7 @@ public class RealtimeBar implements Serializable {
        this.close = close;
        this.volume = volume;
        this.tickCount = tickCount;
+        this.isClosed = isClosed;
    }

    public String getTicker() { return ticker; }
@@ -48,6 +55,7 @@ public class RealtimeBar implements Serializable {
    public long getClose() { return close; }
    public long getVolume() { return volume; }
    public int getTickCount() { return tickCount; }
+    public boolean isClosed() { return isClosed; }

    public void setTicker(String ticker) { this.ticker = ticker; }
    public void setPeriodSeconds(int periodSeconds) { this.periodSeconds = periodSeconds; }
@@ -58,16 +66,22 @@ public class RealtimeBar implements Serializable {
    public void setClose(long close) { this.close = close; }
    public void setVolume(long volume) { this.volume = volume; }
    public void setTickCount(int tickCount) { this.tickCount = tickCount; }
+    public void setClosed(boolean closed) { this.isClosed = closed; }

-    /** ZMQ topic for this bar: e.g., "BTC/USDT.BINANCE|ohlc:60" */
+    /**
+     * ZMQ topic for this bar.
+     * Closed bars:  "{ticker}|ohlc:{period}"       (strategies, existing consumers)
+     * Open bars:    "{ticker}|ohlc:{period}:open"   (chart, live price updates)
+     */
    public String topic() {
-        return ticker + "|ohlc:" + periodSeconds;
+        return ticker + "|ohlc:" + periodSeconds + (isClosed ? "" : ":open");
    }

    @Override
    public String toString() {
        return "RealtimeBar{ticker='" + ticker + "', period=" + periodSeconds +
                "s, windowStart=" + windowStartMs + ", O=" + open + " H=" + high +
-                " L=" + low + " C=" + close + ", ticks=" + tickCount + '}';
+                " L=" + low + " C=" + close + ", ticks=" + tickCount +
+                ", closed=" + isClosed + '}';
    }
 }
--- a/flink/src/main/java/com/dexorder/flink/publisher/RealtimeBarFunction.java
+++ b/flink/src/main/java/com/dexorder/flink/publisher/RealtimeBarFunction.java
@@ -19,8 +19,11 @@ import org.slf4j.LoggerFactory;
 * emitted immediately when the boundary is crossed, so bars are delayed by at most
 * one tick interval (~10s for realtime polling).
 *
- * Periods are configurable at construction time. All configured periods are computed
- * for every ticker receiving ticks; the ZMQ publisher filters to active subscriptions.
+ * Emits two types of bars per tick:
+ *   - Open bar  (isClosed=false): the current accumulator state, every tick.
+ *     Topic: "{ticker}|ohlc:{period}:open" — consumed by charts for live price display.
+ *   - Closed bar (isClosed=true): emitted once when a window boundary is crossed.
+ *     Topic: "{ticker}|ohlc:{period}" — consumed by strategies/triggers.
 *
 * Accumulator layout (long[7]):
 *   [0] open
@@ -68,26 +71,31 @@ public class RealtimeBarFunction extends RichFlatMapFunction<TickWrapper, Realti
            long[] accum = accumState.get(period);

            if (accum == null) {
-                // First tick for this period
-                accumState.put(period, openWindow(tick, windowStart));
+                // First tick for this period — open a new window and emit the first open bar
+                long[] newAccum = openWindow(tick, windowStart);
+                accumState.put(period, newAccum);
+                out.collect(toBar(tick.getTicker(), period, newAccum, false));

            } else if (accum[5] != windowStart) {
-                // Window boundary crossed — emit completed bar then start fresh
+                // Window boundary crossed — emit the closed bar, then start a fresh window
                if (accum[6] > 0) {
-                    out.collect(toBar(tick.getTicker(), period, accum));
-                    LOG.debug("Emitted bar: ticker={}, period={}s, windowStart={}, ticks={}",
+                    out.collect(toBar(tick.getTicker(), period, accum, true));
+                    LOG.debug("Emitted closed bar: ticker={}, period={}s, windowStart={}, ticks={}",
                            tick.getTicker(), period, accum[5], accum[6]);
                }
-                accumState.put(period, openWindow(tick, windowStart));
+                long[] newAccum = openWindow(tick, windowStart);
+                accumState.put(period, newAccum);
+                out.collect(toBar(tick.getTicker(), period, newAccum, false));

            } else {
-                // Same window — update
+                // Same window — update accumulator and emit current open bar
                accum[1] = Math.max(accum[1], tick.getPrice()); // high
                accum[2] = Math.min(accum[2], tick.getPrice()); // low
                accum[3] = tick.getPrice();                      // close
                accum[4] += tick.getAmount();                    // volume
                accum[6]++;                                       // tick count
                accumState.put(period, accum);
+                out.collect(toBar(tick.getTicker(), period, accum, false));
            }
        }
    }
@@ -104,13 +112,14 @@ public class RealtimeBarFunction extends RichFlatMapFunction<TickWrapper, Realti
        };
    }

-    private static RealtimeBar toBar(String ticker, int period, long[] accum) {
+    private static RealtimeBar toBar(String ticker, int period, long[] accum, boolean isClosed) {
        return new RealtimeBar(
                ticker, period,
                accum[5],           // windowStartMs
                accum[0], accum[1], accum[2], accum[3], // O H L C
                accum[4],           // volume
-                (int) accum[6]      // tickCount
+                (int) accum[6],     // tickCount
+                isClosed
        );
    }
 }
--- a/flink/src/main/java/com/dexorder/flink/quotes/Ticker24hFunction.java
+++ b/flink/src/main/java/com/dexorder/flink/quotes/Ticker24hFunction.java
@@ -0,0 +1,172 @@
+package com.dexorder.flink.quotes;
+
+import com.dexorder.proto.QuoteCurrencyIndex;
+import com.dexorder.proto.QuoteCurrencyRate;
+import com.dexorder.proto.Ticker24h;
+import com.dexorder.proto.TickerStats;
+import org.apache.flink.api.common.functions.RichFlatMapFunction;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.util.Collector;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.*;
+
+/**
+ * Flink function that converts TickerBatch messages into Ticker24h snapshots.
+ *
+ * Maintains an in-memory cross-exchange price index to compute std_quote_volume
+ * (quote volume normalized to USD) for each ticker. USD stablecoins are hardcoded
+ * to 1.0; crypto quote currencies are looked up from the exchange price index
+ * using priority order: BINANCE → COINBASE → KRAKEN → others.
+ *
+ * Must run with parallelism=1 (maintains non-replicated cross-exchange state).
+ */
+public class Ticker24hFunction extends RichFlatMapFunction<TickerBatchWrapper, Ticker24hWrapper> {
+    private static final long serialVersionUID = 1L;
+    private static final Logger LOG = LoggerFactory.getLogger(Ticker24hFunction.class);
+
+    private static final Set<String> USD_STABLECOINS = new HashSet<>(Arrays.asList(
+            "USDT", "USDC", "BUSD", "TUSD", "DAI", "USDP", "GUSD"
+    ));
+
+    // Exchanges checked in priority order when looking up cross-currency rates
+    private static final List<String> EXCHANGE_PRIORITY = Arrays.asList(
+            "BINANCE", "COINBASE", "KRAKEN"
+    );
+
+    // exchange → (ticker → lastPrice), maintained across all received batches
+    private transient Map<String, Map<String, Double>> exchangePriceIndex;
+
+    @Override
+    public void open(Configuration parameters) {
+        exchangePriceIndex = new HashMap<>();
+    }
+
+    @Override
+    public void flatMap(TickerBatchWrapper batch, Collector<Ticker24hWrapper> out) {
+        String exchangeId = batch.getExchangeId();
+        long fetchedAt = batch.getFetchedAt();
+        List<TickerBatchWrapper.TickerStatsRow> rows = batch.getTickers();
+
+        // Update cross-exchange price index with this batch's prices
+        Map<String, Double> priceMap = new HashMap<>(rows.size() * 2);
+        for (TickerBatchWrapper.TickerStatsRow row : rows) {
+            if (row.lastPrice > 0) {
+                priceMap.put(row.ticker, row.lastPrice);
+            }
+        }
+        exchangePriceIndex.put(exchangeId, priceMap);
+
+        // Build QuoteCurrencyIndex from all unique quote assets in this batch
+        Set<String> quoteAssets = new LinkedHashSet<>();
+        for (TickerBatchWrapper.TickerStatsRow row : rows) {
+            quoteAssets.add(row.quoteAsset);
+        }
+
+        Map<String, Double> usdRates = new HashMap<>();
+        Map<String, String> usdSources = new HashMap<>();
+        QuoteCurrencyIndex.Builder indexBuilder = QuoteCurrencyIndex.newBuilder()
+                .setGeneratedAt(fetchedAt);
+
+        for (String quoteAsset : quoteAssets) {
+            QuoteCurrencyRate rate = buildRate(quoteAsset, fetchedAt);
+            if (rate != null) {
+                indexBuilder.addRates(rate);
+                usdRates.put(quoteAsset, rate.getUsdRate());
+                usdSources.put(quoteAsset, rate.getSourceTicker());
+            }
+        }
+
+        QuoteCurrencyIndex currencyIndex = indexBuilder.build();
+
+        // Build Ticker24h with std_quote_volume for each ticker
+        Ticker24h.Builder ticker24hBuilder = Ticker24h.newBuilder()
+                .setExchangeId(exchangeId)
+                .setGeneratedAt(fetchedAt)
+                .setCurrencyIndex(currencyIndex);
+
+        for (TickerBatchWrapper.TickerStatsRow row : rows) {
+            TickerStats.Builder tsBuilder = TickerStats.newBuilder()
+                    .setTicker(row.ticker)
+                    .setExchangeId(row.exchangeId)
+                    .setBaseAsset(row.baseAsset)
+                    .setQuoteAsset(row.quoteAsset)
+                    .setLastPrice(row.lastPrice)
+                    .setPriceChangePct(row.priceChangePct)
+                    .setQuoteVolume24H(row.quoteVolume24h)
+                    .setTimestamp(row.timestamp);
+
+            if (row.bidPrice != null)  tsBuilder.setBidPrice(row.bidPrice);
+            if (row.askPrice != null)  tsBuilder.setAskPrice(row.askPrice);
+            if (row.open24h != null)   tsBuilder.setOpen24H(row.open24h);
+            if (row.high24h != null)   tsBuilder.setHigh24H(row.high24h);
+            if (row.low24h != null)    tsBuilder.setLow24H(row.low24h);
+            if (row.volume24h != null) tsBuilder.setVolume24H(row.volume24h);
+            if (row.numTrades != null) tsBuilder.setNumTrades(row.numTrades);
+
+            Double usdRate = usdRates.get(row.quoteAsset);
+            if (usdRate != null) {
+                tsBuilder.setStdQuoteVolume(row.quoteVolume24h * usdRate);
+            }
+
+            ticker24hBuilder.addTickers(tsBuilder.build());
+        }
+
+        byte[] protoBytes = ticker24hBuilder.build().toByteArray();
+
+        String clientId = batch.getClientId();
+        String topic = (clientId != null && !clientId.isEmpty())
+                ? "RESPONSE:" + clientId
+                : exchangeId + "|ticker24h";
+
+        LOG.info("Built Ticker24h snapshot: exchange={}, tickers={}, bytes={}, topic={}",
+                exchangeId, rows.size(), protoBytes.length, topic);
+
+        out.collect(new Ticker24hWrapper(exchangeId, topic, protoBytes));
+    }
+
+    /**
+     * Build a USD rate for a quote currency.
+     * Returns null if no conversion path is known (fiat, or crypto with no available pair).
+     */
+    private QuoteCurrencyRate buildRate(String currency, long timestampNs) {
+        if (USD_STABLECOINS.contains(currency)) {
+            return QuoteCurrencyRate.newBuilder()
+                    .setCurrency(currency)
+                    .setUsdRate(1.0)
+                    .setSourceTicker("hardcoded")
+                    .setTimestamp(timestampNs)
+                    .build();
+        }
+
+        // Try priority exchanges first, then any remaining exchange
+        List<String> orderedExchanges = new ArrayList<>(EXCHANGE_PRIORITY);
+        for (String ex : exchangePriceIndex.keySet()) {
+            if (!orderedExchanges.contains(ex)) {
+                orderedExchanges.add(ex);
+            }
+        }
+
+        for (String exchange : orderedExchanges) {
+            Map<String, Double> priceMap = exchangePriceIndex.get(exchange);
+            if (priceMap == null) continue;
+
+            for (String stablecoin : Arrays.asList("USDT", "USDC")) {
+                String pairTicker = currency + "/" + stablecoin + "." + exchange;
+                Double price = priceMap.get(pairTicker);
+                if (price != null && price > 0) {
+                    return QuoteCurrencyRate.newBuilder()
+                            .setCurrency(currency)
+                            .setUsdRate(price)
+                            .setSourceTicker(pairTicker)
+                            .setTimestamp(timestampNs)
+                            .build();
+                }
+            }
+        }
+
+        LOG.debug("No USD conversion path for quote currency: {}", currency);
+        return null;
+    }
+}
--- a/flink/src/main/java/com/dexorder/flink/quotes/Ticker24hPublisher.java
+++ b/flink/src/main/java/com/dexorder/flink/quotes/Ticker24hPublisher.java
@@ -0,0 +1,78 @@
+package com.dexorder.flink.quotes;
+
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.streaming.api.functions.sink.RichSinkFunction;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.zeromq.SocketType;
+import org.zeromq.ZContext;
+import org.zeromq.ZMQ;
+
+/**
+ * Flink sink that publishes Ticker24h snapshots to subscribers via ZMQ.
+ *
+ * Connects a ZMQ PUSH socket to the job manager's notification PULL endpoint.
+ * HistoryNotificationForwarder receives these frames and enqueues them to
+ * RealtimeSubscriptionManager, which publishes them on the MARKET_DATA_PUB XPUB socket.
+ * Clients subscribed to "{exchange_id}|ticker24h" receive the snapshot.
+ *
+ * Wire format (matches other notification publishers):
+ *   Frame 1: topic bytes  (e.g., "BINANCE|ticker24h")
+ *   Frame 2: [0x01]       (protocol version)
+ *   Frame 3: [0x0D][Ticker24h protobuf bytes]  (type 0x0D = TICKER_24H)
+ *
+ * Parallelism MUST be 1.
+ */
+public class Ticker24hPublisher extends RichSinkFunction<Ticker24hWrapper> {
+    private static final Logger LOG = LoggerFactory.getLogger(Ticker24hPublisher.class);
+    private static final long serialVersionUID = 1L;
+
+    private static final byte PROTOCOL_VERSION = 0x01;
+    private static final byte MSG_TYPE_TICKER_24H = 0x0D;
+
+    private final String jobManagerPullEndpoint;
+
+    private transient ZContext context;
+    private transient ZMQ.Socket pushSocket;
+
+    public Ticker24hPublisher(String jobManagerPullEndpoint) {
+        this.jobManagerPullEndpoint = jobManagerPullEndpoint;
+    }
+
+    @Override
+    public void open(Configuration parameters) {
+        context = new ZContext();
+        pushSocket = context.createSocket(SocketType.PUSH);
+        pushSocket.setLinger(1000);
+        pushSocket.setSndHWM(10000);
+        pushSocket.connect(jobManagerPullEndpoint);
+        LOG.info("Ticker24hPublisher PUSH connected to {}", jobManagerPullEndpoint);
+    }
+
+    @Override
+    public void invoke(Ticker24hWrapper wrapper, Context context) {
+        try {
+            byte[] protoBytes = wrapper.getProtoBytes();
+            byte[] messageFrame = new byte[1 + protoBytes.length];
+            messageFrame[0] = MSG_TYPE_TICKER_24H;
+            System.arraycopy(protoBytes, 0, messageFrame, 1, protoBytes.length);
+
+            String topic = wrapper.getZmqTopic();
+            pushSocket.sendMore(topic.getBytes(ZMQ.CHARSET));
+            pushSocket.sendMore(new byte[]{PROTOCOL_VERSION});
+            pushSocket.send(messageFrame, 0);
+
+            LOG.info("Published Ticker24h snapshot: topic={}, bytes={}", topic, protoBytes.length);
+
+        } catch (Exception e) {
+            LOG.error("Failed to publish Ticker24h: exchange={}", wrapper.getExchangeId(), e);
+        }
+    }
+
+    @Override
+    public void close() {
+        if (pushSocket != null) pushSocket.close();
+        if (context != null) context.close();
+        LOG.info("Ticker24hPublisher closed");
+    }
+}
--- a/flink/src/main/java/com/dexorder/flink/quotes/Ticker24hScheduler.java
+++ b/flink/src/main/java/com/dexorder/flink/quotes/Ticker24hScheduler.java
@@ -0,0 +1,71 @@
+package com.dexorder.flink.quotes;
+
+import com.dexorder.flink.ingestor.IngestorBroker;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.List;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Schedules periodic TICKER_SNAPSHOT requests for all configured exchanges.
+ *
+ * Fires immediately on startup, then at the top of each hour.
+ * The IngestorBroker dispatches the requests to ingestor workers, which call
+ * fetchTickers() and publish TickerBatch messages to the market-ticker Kafka topic.
+ */
+public class Ticker24hScheduler {
+    private static final Logger LOG = LoggerFactory.getLogger(Ticker24hScheduler.class);
+
+    private final IngestorBroker broker;
+    private final List<String> exchanges;
+    private final ScheduledExecutorService scheduler;
+
+    public Ticker24hScheduler(IngestorBroker broker, List<String> exchanges) {
+        this.broker = broker;
+        this.exchanges = exchanges;
+        this.scheduler = Executors.newSingleThreadScheduledExecutor(r -> {
+            Thread t = new Thread(r, "Ticker24hScheduler");
+            t.setDaemon(true);
+            return t;
+        });
+    }
+
+    public void start() {
+        // Fire immediately for all exchanges
+        fireAll();
+
+        // Schedule next firing at top of next hour, then every hour after that
+        long delayMs = msUntilNextHour();
+        scheduler.scheduleAtFixedRate(this::fireAll, delayMs, 3_600_000L, TimeUnit.MILLISECONDS);
+
+        long delayMin = delayMs / 60_000;
+        LOG.info("Ticker24hScheduler started: fired immediately for {}, next firing in ~{}min",
+                exchanges, delayMin);
+    }
+
+    public void stop() {
+        scheduler.shutdownNow();
+        LOG.info("Ticker24hScheduler stopped");
+    }
+
+    private void fireAll() {
+        LOG.info("Ticker24hScheduler firing TICKER_SNAPSHOT requests for exchanges: {}", exchanges);
+        for (String exchange : exchanges) {
+            try {
+                broker.submitTicker24hRequest(exchange);
+            } catch (Exception e) {
+                LOG.error("Failed to submit TICKER_SNAPSHOT for exchange={}", exchange, e);
+            }
+        }
+    }
+
+    /** Milliseconds until the next full-hour boundary (e.g., 14:00:00.000). */
+    private static long msUntilNextHour() {
+        long now = System.currentTimeMillis();
+        long nextHour = (now / 3_600_000L + 1) * 3_600_000L;
+        return nextHour - now;
+    }
+}
--- a/flink/src/main/java/com/dexorder/flink/quotes/Ticker24hWrapper.java
+++ b/flink/src/main/java/com/dexorder/flink/quotes/Ticker24hWrapper.java
@@ -0,0 +1,24 @@
+package com.dexorder.flink.quotes;
+
+import java.io.Serializable;
+
+/**
+ * Wrapper for a serialized Ticker24h proto message, ready for ZMQ publication.
+ */
+public class Ticker24hWrapper implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    private final String exchangeId;
+    private final String zmqTopic; // "RESPONSE:{clientId}" or "{exchange}|ticker24h"
+    private final byte[] protoBytes; // serialized Ticker24h proto
+
+    public Ticker24hWrapper(String exchangeId, String zmqTopic, byte[] protoBytes) {
+        this.exchangeId = exchangeId;
+        this.zmqTopic = zmqTopic;
+        this.protoBytes = protoBytes;
+    }
+
+    public String getExchangeId() { return exchangeId; }
+    public String getZmqTopic() { return zmqTopic; }
+    public byte[] getProtoBytes() { return protoBytes; }
+}
--- a/flink/src/main/java/com/dexorder/flink/quotes/TickerBatchDeserializer.java
+++ b/flink/src/main/java/com/dexorder/flink/quotes/TickerBatchDeserializer.java
@@ -0,0 +1,95 @@
+package com.dexorder.flink.quotes;
+
+import com.dexorder.proto.TickerBatch;
+import com.dexorder.proto.TickerStats;
+import org.apache.flink.api.common.serialization.DeserializationSchema;
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Kafka deserializer for TickerBatch protobuf messages from the market-ticker topic.
+ * Wire format: [0x01 version][0x0C type][protobuf bytes]
+ */
+public class TickerBatchDeserializer implements DeserializationSchema<TickerBatchWrapper> {
+    private static final long serialVersionUID = 1L;
+    private static final Logger LOG = LoggerFactory.getLogger(TickerBatchDeserializer.class);
+
+    private static final byte PROTOCOL_VERSION = 0x01;
+    private static final byte MSG_TYPE_TICKER_BATCH = 0x0C;
+
+    @Override
+    public TickerBatchWrapper deserialize(byte[] message) throws IOException {
+        try {
+            if (message.length < 2) {
+                throw new IOException("Message too short: " + message.length + " bytes");
+            }
+
+            byte version = message[0];
+            if (version != PROTOCOL_VERSION) {
+                throw new IOException("Unsupported protocol version: " + version);
+            }
+
+            byte messageType = message[1];
+            if (messageType != MSG_TYPE_TICKER_BATCH) {
+                throw new IOException("Unexpected message type: 0x" + Integer.toHexString(messageType & 0xFF));
+            }
+
+            byte[] protoPayload = new byte[message.length - 2];
+            System.arraycopy(message, 2, protoPayload, 0, protoPayload.length);
+
+            TickerBatchWrapper wrapper = parseTickerBatch(protoPayload);
+            LOG.debug("Deserialized TickerBatch: exchange={}, tickers={}",
+                    wrapper.getExchangeId(), wrapper.getTickerCount());
+            return wrapper;
+
+        } catch (Exception e) {
+            LOG.error("Failed to deserialize TickerBatch", e);
+            throw new IOException("Failed to deserialize TickerBatch", e);
+        }
+    }
+
+    private TickerBatchWrapper parseTickerBatch(byte[] payload) throws Exception {
+        TickerBatch batch = TickerBatch.parseFrom(payload);
+
+        List<TickerBatchWrapper.TickerStatsRow> rows = new ArrayList<>(batch.getTickersCount());
+        for (TickerStats ts : batch.getTickersList()) {
+            rows.add(new TickerBatchWrapper.TickerStatsRow(
+                    ts.getTicker(),
+                    ts.getExchangeId(),
+                    ts.getBaseAsset(),
+                    ts.getQuoteAsset(),
+                    ts.getLastPrice(),
+                    ts.getPriceChangePct(),
+                    ts.getQuoteVolume24H(),
+                    ts.getTimestamp(),
+                    ts.hasBidPrice()   ? ts.getBidPrice()   : null,
+                    ts.hasAskPrice()   ? ts.getAskPrice()   : null,
+                    ts.hasOpen24H()    ? ts.getOpen24H()    : null,
+                    ts.hasHigh24H()    ? ts.getHigh24H()    : null,
+                    ts.hasLow24H()     ? ts.getLow24H()     : null,
+                    ts.hasVolume24H()  ? ts.getVolume24H()  : null,
+                    ts.hasNumTrades()  ? ts.getNumTrades()  : null
+            ));
+        }
+
+        return new TickerBatchWrapper(
+                batch.getExchangeId(), rows, batch.getFetchedAt(),
+                batch.hasClientId() ? batch.getClientId() : "",
+                batch.hasRequestId() ? batch.getRequestId() : "");
+    }
+
+    @Override
+    public boolean isEndOfStream(TickerBatchWrapper nextElement) {
+        return false;
+    }
+
+    @Override
+    public TypeInformation<TickerBatchWrapper> getProducedType() {
+        return TypeInformation.of(TickerBatchWrapper.class);
+    }
+}
--- a/flink/src/main/java/com/dexorder/flink/quotes/TickerBatchWrapper.java
+++ b/flink/src/main/java/com/dexorder/flink/quotes/TickerBatchWrapper.java
@@ -0,0 +1,86 @@
+package com.dexorder.flink.quotes;
+
+import java.io.Serializable;
+import java.util.List;
+
+/**
+ * POJO wrapper for TickerBatch Kafka messages from market-ticker topic.
+ * Unwraps the protobuf into plain Java fields for Flink processing.
+ */
+public class TickerBatchWrapper implements Serializable {
+    private static final long serialVersionUID = 1L;
+
+    private final String exchangeId;
+    private final List<TickerStatsRow> tickers;
+    private final long fetchedAt; // nanoseconds
+    private final String clientId;  // non-empty = client-initiated; "" = scheduled broadcast
+    private final String requestId; // echoed for tracing
+
+    public TickerBatchWrapper(String exchangeId, List<TickerStatsRow> tickers, long fetchedAt,
+                              String clientId, String requestId) {
+        this.exchangeId = exchangeId;
+        this.tickers = tickers;
+        this.fetchedAt = fetchedAt;
+        this.clientId = clientId != null ? clientId : "";
+        this.requestId = requestId != null ? requestId : "";
+    }
+
+    public String getExchangeId() { return exchangeId; }
+    public List<TickerStatsRow> getTickers() { return tickers; }
+    public long getFetchedAt() { return fetchedAt; }
+    public String getClientId() { return clientId; }
+    public String getRequestId() { return requestId; }
+    public int getTickerCount() { return tickers != null ? tickers.size() : 0; }
+
+    @Override
+    public String toString() {
+        return "TickerBatchWrapper{exchangeId='" + exchangeId + "', count=" + getTickerCount() + '}';
+    }
+
+    /**
+     * Single ticker stats row. Optional fields are null when the exchange did not provide them.
+     */
+    public static class TickerStatsRow implements Serializable {
+        private static final long serialVersionUID = 1L;
+
+        public final String ticker;
+        public final String exchangeId;
+        public final String baseAsset;
+        public final String quoteAsset;
+        public final double lastPrice;
+        public final double priceChangePct;
+        public final double quoteVolume24h;
+        public final long timestamp; // nanoseconds
+        // Optional fields — null if not provided by exchange
+        public final Double bidPrice;
+        public final Double askPrice;
+        public final Double open24h;
+        public final Double high24h;
+        public final Double low24h;
+        public final Double volume24h;
+        public final Integer numTrades;
+
+        public TickerStatsRow(
+                String ticker, String exchangeId, String baseAsset, String quoteAsset,
+                double lastPrice, double priceChangePct, double quoteVolume24h, long timestamp,
+                Double bidPrice, Double askPrice,
+                Double open24h, Double high24h, Double low24h, Double volume24h,
+                Integer numTrades) {
+            this.ticker = ticker;
+            this.exchangeId = exchangeId;
+            this.baseAsset = baseAsset;
+            this.quoteAsset = quoteAsset;
+            this.lastPrice = lastPrice;
+            this.priceChangePct = priceChangePct;
+            this.quoteVolume24h = quoteVolume24h;
+            this.timestamp = timestamp;
+            this.bidPrice = bidPrice;
+            this.askPrice = askPrice;
+            this.open24h = open24h;
+            this.high24h = high24h;
+            this.low24h = low24h;
+            this.volume24h = volume24h;
+            this.numTrades = numTrades;
+        }
+    }
+}
--- a/flink/src/main/resources/topics.yaml
+++ b/flink/src/main/resources/topics.yaml
@@ -28,6 +28,16 @@ topics:
      compression.type: snappy
      cleanup.policy: delete

+  # 24-hour rolling ticker snapshots for all symbols on an exchange.
+  # Written by ingestors on TICKER_SNAPSHOT requests; consumed by Ticker24hConsumer.
+  - name: market-ticker
+    partitions: 3
+    replication: 2
+    config:
+      retention.ms: 7200000  # 2 hours (hourly refresh; keep one backup)
+      compression.type: snappy
+      cleanup.policy: delete
+
  # Symbol metadata from ingestors
  - name: symbol-metadata
    partitions: 3
--- a/gateway/knowledge/api-reference.md
+++ b/gateway/knowledge/api-reference.md
@@ -247,6 +247,63 @@ class DataAPI(ABC):
        """
        pass

+    @abstractmethod
+    async def get_ticker_24h(
+        self,
+        exchange: str,
+        limit: Optional[int] = None,
+        min_std_quote_volume: Optional[float] = None,
+        market_type: Optional[str] = None,
+        base_asset_contains: Optional[str] = None,
+    ) -> pd.DataFrame:
+        """
+        Retrieve 24h rolling market stats for all symbols on an exchange.
+
+        Data is refreshed hourly by the ingestor pipeline. Use this to build a
+        pre-filtered symbol universe before running a scanner — it avoids requesting
+        per-symbol OHLC data for thousands of symbols.
+
+        Args:
+            exchange: Exchange name (e.g., "BINANCE", "COINBASE", "KRAKEN")
+            limit: If set, return only the Top N symbols By Volume. None = return all.
+            min_std_quote_volume: Exclude symbols with USD volume below this threshold.
+            market_type: Filter by market type: "spot" or "perp". None = return all.
+            base_asset_contains: Filter to symbols whose base asset contains this string
+                                  (case-insensitive). E.g., "BTC" matches "BTC/USDT".
+
+        Returns:
+            DataFrame sorted by std_quote_volume descending (NULLs last). Columns:
+            - ticker: Full ticker (e.g., "BTC/USDT.BINANCE")
+            - exchange_id: Exchange name
+            - base_asset: Base currency (e.g., "BTC")
+            - quote_asset: Quote currency (e.g., "USDT")
+            - last_price: Last traded price in quote currency
+            - price_change_pct: 24h price change as percentage (e.g. 2.5 = +2.5%)
+            - quote_volume_24h: Raw 24h volume in quote asset
+            - std_quote_volume: quote_volume_24h normalized to USD (NaN if conversion unknown)
+            - bid_price, ask_price: Current best bid/ask (NaN if not provided by exchange)
+            - open_24h, high_24h, low_24h: 24h OHLC prices (NaN if not provided)
+            - volume_24h: Base-asset volume (NaN if not provided)
+            - num_trades: 24h trade count (NaN if not provided)
+            - timestamp_ms: Snapshot timestamp in milliseconds
+
+            Returns empty DataFrame if no data is available (e.g., not yet fetched).
+
+        Examples:
+            # Top 50 most liquid Binance spot symbols
+            df = await api.data.get_ticker_24h("BINANCE", limit=50, market_type="spot")
+
+            # All BTC pairs with at least $10M daily volume
+            df = await api.data.get_ticker_24h("BINANCE",
+                                                base_asset_contains="BTC",
+                                                min_std_quote_volume=10_000_000)
+
+            # Build a scanner universe: all Binance symbols, sorted by volume
+            universe = await api.data.get_ticker_24h("BINANCE")
+            top_100 = universe.head(100)["ticker"].tolist()
+        """
+        pass
+
 ```


--- a/gateway/knowledge/usage-examples.md
+++ b/gateway/knowledge/usage-examples.md
@@ -92,6 +92,61 @@ All columns below are fully populated for Binance data. Other exchanges provide
 - `"ticker"` - Market identifier
 - `"period_seconds"` - Period in seconds

+## Building a Scanner Universe with get_ticker_24h
+
+**Always pre-filter symbols before fetching OHLC data for scanners.** Fetching OHLC for all ~1800 Binance symbols would exhaust the 2M-bar per-script budget instantly. Use `get_ticker_24h` to get a ranked list of all symbols for free (no OHLC budget cost), then run per-symbol analysis only on the filtered set.
+
+```python
+from dexorder.api import get_api
+import asyncio
+
+api = get_api()
+
+# Get top 50 most liquid Binance spot symbols (no OHLC budget used)
+universe = asyncio.run(api.data.get_ticker_24h(
+    "BINANCE",
+    limit=50,
+    market_type="spot",
+    min_std_quote_volume=10_000_000  # $10M+ daily volume
+))
+print(f"Universe: {len(universe)} symbols")
+print(universe[["ticker", "std_quote_volume", "price_change_pct"]].head(10))
+
+# Now fetch OHLC only for these symbols
+tickers = universe["ticker"].tolist()
+results = {}
+for ticker in tickers:
+    df = asyncio.run(api.data.historical_ohlc(
+        ticker=ticker,
+        period_seconds=3600,
+        start_time="2024-01-01",
+        end_time="2025-01-01",
+        extra_columns=["volume"]
+    ))
+    print(f"[Data] {ticker}: {len(df)} bars")
+    results[ticker] = df
+```
+
+### get_ticker_24h filter parameters
+
+```python
+# All BTC pairs on Binance (spot + perp)
+df = asyncio.run(api.data.get_ticker_24h("BINANCE", base_asset_contains="BTC"))
+
+# Top 100 perp markets with at least $50M daily volume
+df = asyncio.run(api.data.get_ticker_24h(
+    "BINANCE",
+    limit=100,
+    market_type="perp",
+    min_std_quote_volume=50_000_000
+))
+
+# All Coinbase symbols (for a cross-exchange scan)
+df = asyncio.run(api.data.get_ticker_24h("COINBASE"))
+```
+
+The returned DataFrame is sorted by `std_quote_volume` (USD-normalized volume) descending. Symbols without a USD conversion path have `std_quote_volume = NaN` and appear last. Columns: `ticker`, `exchange_id`, `base_asset`, `quote_asset`, `last_price`, `price_change_pct`, `quote_volume_24h`, `std_quote_volume`, `bid_price`, `ask_price`, `open_24h`, `high_24h`, `low_24h`, `volume_24h`, `num_trades`, `timestamp_ms`.
+
 ## Using the Charting API

 The charting API provides styled financial charts with OHLC candlesticks and technical indicators.
--- a/gateway/prompt/agent-main.md
+++ b/gateway/prompt/agent-main.md
@@ -89,7 +89,7 @@ After patching, confirm the change to the user.

 ## Symbol Resolution

-Always use `SymbolLookup` to resolve tickers before passing them to research or chart tools. Symbols must be in `SYMBOL.EXCHANGE` format (e.g., `BTC/USDT.BINANCE`). If the user says "ETHUSDT", "ETH", or any ambiguous ticker, resolve it first. If not specified by the user, prefer to use the most prominent exchange available (e.g. BINANCE not KRAKEN)
+Always use `SymbolLookup` to resolve tickers before passing them to research or chart tools. Symbols must be in `SYMBOL.EXCHANGE` format (e.g., `BTC/USDT.BINANCE`). If the user says "ETHUSDT", "ETH", or any ambiguous ticker, resolve it first. `SymbolLookup` results are sorted by 24h volume descending — pick the top result when the user hasn't specified an exchange.

 ## Raw Data Retrieval

--- a/gateway/prompt/agent-research.md
+++ b/gateway/prompt/agent-research.md
@@ -66,6 +66,27 @@ Quick reference — approximate bars per resolution at various windows:

 **When to shorten the window**: only if 5 years at the chosen resolution would far exceed 200,000 bars (e.g., 5m over 5 years ≈ 525k → shorten to ~2 years). Otherwise always use the full 5 years.

+## Multi-Symbol Analysis
+
+When scanning many symbols, scale the per-symbol time window so total bars stay within the **2,000,000-bar script limit**. The API enforces this — exceeding it raises a `ValueError` with the limit number and suggestions.
+
+Budget rule: `bars_per_symbol ≈ 2,000,000 / num_symbols` (never exceed 200,000 per symbol)
+
+| Symbol count | Recommended period | Approx max window |
+|---|---|---|
+| ≤ 10 | any | 5 years |
+| 10–100 | 1h or coarser | scale to budget |
+| 100–500 | 1d (86400s) | ~1–2 years |
+| 500+ | 1d (86400s) | ≤ 1 year |
+
+**Strategy for large symbol lists**:
+1. **Filter first**: scan all symbols with a short window (90–180 days, daily bars) to rank/screen candidates
+2. **Zoom in**: fetch full history only for the top N (≤ 20) finalists
+3. **Never use intraday periods for > 50 symbols** in one script
+4. **Print progress** every 50 symbols so the output log shows the script is alive
+
+If you hit a `ValueError` about the bar budget, read the limit and suggestions in the error message, then adjust the period or window accordingly.
+
 ## Tool Behavior Notes

 - **`PythonWrite` / `PythonEdit` for research**: auto-executes the script and returns all output (stdout, stderr) and captured images. **Do not call `ExecuteResearch` afterward** — the script has already run.
@@ -89,6 +110,30 @@ The API provides two main components:

 See the knowledge base sections below for complete API documentation, examples, and the full pandas-ta indicator reference.

+### Scanner Pre-filtering with get_ticker_24h
+
+**Before fetching OHLC data for multiple symbols, always build a pre-filtered universe first.**
+
+Scanners must not blindly fetch OHLC for all symbols on an exchange — Binance has ~1800 symbols and the script budget is 2M bars total. Use `api.data.get_ticker_24h()` to get a ranked, filterable list of all symbols without consuming any OHLC budget:
+
+```python
+# Get top 50 most liquid Binance spot symbols by USD volume
+universe = asyncio.run(api.data.get_ticker_24h(
+    "BINANCE",
+    limit=50,
+    market_type="spot",
+    min_std_quote_volume=10_000_000  # $10M+ daily volume
+))
+tickers = universe["ticker"].tolist()
+print(f"Universe: {len(tickers)} symbols")
+
+# Now fetch OHLC only for these symbols
+for ticker in tickers:
+    df = asyncio.run(api.data.historical_ohlc(ticker, period_seconds=3600, ...))
+```
+
+`get_ticker_24h` returns a DataFrame sorted by `std_quote_volume` (USD-normalized) descending, with columns: `ticker`, `exchange_id`, `base_asset`, `quote_asset`, `last_price`, `price_change_pct`, `quote_volume_24h`, `std_quote_volume`, `bid_price`, `ask_price`, `open_24h`, `high_24h`, `low_24h`, `volume_24h`, `num_trades`, `timestamp_ms`. See the full docstring in the knowledge base `api-reference.md`.
+
 ## Technical Indicators — pandas-ta

 Use `import pandas_ta as ta` for all indicator calculations. Never write manual rolling/ewm implementations. The full indicator catalog, calling conventions, column naming patterns, and default parameters are in the pandas-ta-reference section of your knowledge base.
--- a/gateway/prompt/tools.md
+++ b/gateway/prompt/tools.md
@@ -22,6 +22,7 @@ Available to all agents:
 | `PythonList` | List existing scripts by category (`strategy`, `indicator`, or `research`) |
 | `SymbolLookup` | Resolve a ticker to the correct `SYMBOL.EXCHANGE` format |
 | `GetChartData` | Fetch raw OHLC data (casual retrieval only — use `Spawn` research for analysis) |
+| `GetTicker24h` | Fetch 24h market stats for all symbols on an exchange, sorted by USD volume — use this to build scanner universes without burning OHLC bar budget |
 | `WebSearch` | Search the web (Tavily) |
 | `FetchPage` | Fetch and read a web page or PDF |
 | `ArxivSearch` | Search arXiv for academic papers |
--- a/gateway/src/channels/websocket-handler.ts
+++ b/gateway/src/channels/websocket-handler.ts
@@ -57,6 +57,7 @@ interface BarSubscription {
  ticker: string;
  periodSeconds: number;
  callback: BarUpdateCallback;
+  openBars: boolean;
 }

 export class WebSocketHandler {
@@ -65,6 +66,8 @@ export class WebSocketHandler {
  private workspaces = new Map<string, WorkspaceManager>();
  /** Per-session realtime bar subscriptions for cleanup on disconnect */
  private barSubscriptions = new Map<string, BarSubscription[]>();
+  /** "sessionId:pandas_ta_name" → active request_id; supersedes stale requests on scroll */
+  private activeEvaluations = new Map<string, string>();

  constructor(config: WebSocketHandlerConfig) {
    this.config = config;
@@ -501,13 +504,19 @@ export class WebSocketHandler {
        const sessionId = authContext.sessionId;
        const subs = this.barSubscriptions.get(sessionId);
        if (subs && this.config.ohlcService) {
-          for (const { ticker, periodSeconds, callback } of subs) {
-            this.config.ohlcService.unsubscribeFromTicker(ticker, periodSeconds, callback);
+          for (const { ticker, periodSeconds, callback, openBars } of subs) {
+            this.config.ohlcService.unsubscribeFromTicker(ticker, periodSeconds, callback, openBars);
          }
          this.barSubscriptions.delete(sessionId);
          logger.info({ sessionId, count: subs.length }, 'Cleaned up realtime bar subscriptions');
        }

+        // Cleanup active indicator evaluations for this session
+        const evalPrefix = `${sessionId}:`;
+        for (const key of this.activeEvaluations.keys()) {
+          if (key.startsWith(evalPrefix)) this.activeEvaluations.delete(key);
+        }
+
        // Cleanup workspace
        await workspace!.shutdown();
        this.workspaces.delete(authContext.sessionId);
@@ -623,18 +632,11 @@ export class WebSocketHandler {

        case 'search_symbols': {
          logger.info({ query: payload.query, limit: payload.limit }, 'Handling search_symbols');
-          // Use SymbolIndexService if available, otherwise fallback to OHLCService stub
          const symbolIndexService = this.config.symbolIndexService;
-          logger.info({ hasSymbolIndexService: !!symbolIndexService }, 'Service check for search');

          const results = symbolIndexService
            ? await symbolIndexService.search(payload.query, payload.limit || 30)
-            : (ohlcService ? await ohlcService.searchSymbols(
-                payload.query,
-                payload.symbol_type,
-                payload.exchange,
-                payload.limit || 30
-              ) : []);
+            : [];

          logger.info({ resultsCount: results.length }, 'Search complete');
          socket.send(
@@ -649,13 +651,11 @@ export class WebSocketHandler {

        case 'resolve_symbol': {
          logger.info({ symbol: payload.symbol }, 'Handling resolve_symbol');
-          // Use SymbolIndexService if available, otherwise fallback to OHLCService stub
          const symbolIndexService = this.config.symbolIndexService;
-          logger.info({ hasSymbolIndexService: !!symbolIndexService }, 'Service check for resolve');

          const symbolInfo = symbolIndexService
            ? await symbolIndexService.resolveSymbol(payload.symbol)
-            : (ohlcService ? await ohlcService.resolveSymbol(payload.symbol) : null);
+            : null;

          logger.info({ found: !!symbolInfo }, 'Symbol resolution complete');

@@ -723,6 +723,8 @@ export class WebSocketHandler {

          const subTicker: string = payload.symbol;
          const subPeriod: number = payload.period_seconds ?? payload.resolution ?? 60;
+          // 'open' = in-progress bar snapshots every tick (chart); 'closed' = completed bars only (strategies)
+          const openBars: boolean = (payload.bar_type ?? 'open') === 'open';
          const sessionId = authContext.sessionId;

          // Create a per-subscription callback that forwards bars to this socket
@@ -733,6 +735,7 @@ export class WebSocketHandler {
              subscription_id: payload.subscription_id,
              ticker: bar.ticker,
              period_seconds: bar.periodSeconds,
+              is_closed: bar.isClosed,
              bar: {
                // Convert nanoseconds → seconds for client compatibility
                time: Number(bar.timestamp / 1_000_000_000n),
@@ -745,7 +748,7 @@ export class WebSocketHandler {
            }));
          };

-          ohlcService.subscribeToTicker(subTicker, subPeriod, barCallback);
+          ohlcService.subscribeToTicker(subTicker, subPeriod, barCallback, openBars);

          // Track for cleanup on disconnect
          if (!this.barSubscriptions.has(sessionId)) {
@@ -755,6 +758,7 @@ export class WebSocketHandler {
            ticker: subTicker,
            periodSeconds: subPeriod,
            callback: barCallback,
+            openBars,
          });

          logger.info({ sessionId, ticker: subTicker, period: subPeriod }, 'Subscribed to realtime bars');
@@ -782,7 +786,7 @@ export class WebSocketHandler {
            );
            if (idx >= 0) {
              const [removed] = subs.splice(idx, 1);
-              ohlcService.unsubscribeFromTicker(unsubTicker, unsubPeriod, removed.callback);
+              ohlcService.unsubscribeFromTicker(unsubTicker, unsubPeriod, removed.callback, removed.openBars);
              logger.info({ sessionId, ticker: unsubTicker, period: unsubPeriod }, 'Unsubscribed from realtime bars');
            }
          }
@@ -807,6 +811,19 @@ export class WebSocketHandler {
            }));
            break;
          }
+
+          // Supersede any in-flight request for the same indicator (e.g. rapid scrolling)
+          const evalKey = `${authContext.sessionId}:${payload.pandas_ta_name}`;
+          const prevRequestId = this.activeEvaluations.get(evalKey);
+          if (prevRequestId) {
+            socket.send(JSON.stringify({
+              type: 'evaluate_indicator_result',
+              request_id: prevRequestId,
+              error: 'superseded',
+            }));
+          }
+          this.activeEvaluations.set(evalKey, requestId);
+
          try {
            const mcpResult = await harness.callMcpTool('EvaluateIndicator', {
              symbol: payload.symbol,
@@ -816,6 +833,11 @@ export class WebSocketHandler {
              pandas_ta_name: payload.pandas_ta_name,
              parameters: payload.parameters ?? {},
            }) as any;
+
+            // Discard result if a newer request arrived while we were awaiting
+            if (this.activeEvaluations.get(evalKey) !== requestId) break;
+            this.activeEvaluations.delete(evalKey);
+
            // MCP returns { content: [{type: 'text', text: '...json...'}] }
            // When the tool raises an exception, the MCP framework sets isError: true
            // and puts the raw exception text in content[0].text (not JSON-wrapped).
@@ -849,6 +871,9 @@ export class WebSocketHandler {
              ...data,
            }));
          } catch (err: any) {
+            if (this.activeEvaluations.get(evalKey) === requestId) {
+              this.activeEvaluations.delete(evalKey);
+            }
            logger.error({ err: err?.message, pandas_ta_name: payload.pandas_ta_name }, 'evaluate_indicator handler error');
            socket.send(JSON.stringify({
              type: 'evaluate_indicator_result',
--- a/gateway/src/clients/zmq-protocol.ts
+++ b/gateway/src/clients/zmq-protocol.ts
@@ -20,11 +20,15 @@ import type {
  NotificationStatus,
 } from '../types/ohlc.js';

-export const OHLC_BAR_TOPIC_PATTERN = /^(.+)\|ohlc:(\d+)$/;
+// Matches both "{ticker}|ohlc:{period}" (closed) and "{ticker}|ohlc:{period}:open" (open bar)
+export const OHLC_BAR_TOPIC_PATTERN = /^(.+)\|ohlc:(\d+)(:open)?$/;
+
+// Matches "{exchange_id}|ticker24h"  (e.g., "BINANCE|ticker24h")
+export const TICKER24H_TOPIC_PATTERN = /^([A-Z0-9]+)\|ticker24h$/;

 /** Decoded realtime OHLC bar received from the XPUB market data stream */
 export interface RealtimeBar {
-  topic: string;       // e.g., "BTC/USDT.BINANCE|ohlc:60"
+  topic: string;       // e.g., "BTC/USDT.BINANCE|ohlc:60" or "BTC/USDT.BINANCE|ohlc:60:open"
  ticker: string;      // e.g., "BTC/USDT.BINANCE"
  periodSeconds: number;
  /** Window open time in nanoseconds since epoch */
@@ -34,6 +38,35 @@ export interface RealtimeBar {
  low: number;
  close: number;
  volume: number;
+  /** True if this bar's time window has fully closed (strategies); false if still accumulating (chart). */
+  isClosed: boolean;
+}
+
+/** Single ticker 24h stats from a Ticker24h snapshot */
+export interface Ticker24hStats {
+  ticker: string;
+  exchange_id: string;
+  base_asset: string;
+  quote_asset: string;
+  last_price: number;
+  price_change_pct: number;
+  quote_volume_24h: number;
+  timestamp_ms: number;        // milliseconds (converted from nanoseconds)
+  bid_price?: number;
+  ask_price?: number;
+  open_24h?: number;
+  high_24h?: number;
+  low_24h?: number;
+  volume_24h?: number;
+  std_quote_volume?: number;   // null if conversion unknown
+  num_trades?: number;
+}
+
+/** Decoded Ticker24h snapshot received from the XPUB market data stream */
+export interface Ticker24hSnapshot {
+  exchange_id: string;
+  tickers: Ticker24hStats[];
+  generated_at_ms: number;     // milliseconds (converted from nanoseconds)
 }

 const __filename = fileURLToPath(import.meta.url);
@@ -58,14 +91,17 @@ const root = new protobuf.Root();
 // Load proto files
 const ingestorProto = readFileSync(join(protoDir, 'ingestor.proto'), 'utf8');
 const ohlcProto = readFileSync(join(protoDir, 'ohlc.proto'), 'utf8');
+const ticker24hProto = readFileSync(join(protoDir, 'ticker24h.proto'), 'utf8');
 protobuf.parse(ingestorProto, root);
 protobuf.parse(ohlcProto, root);
+protobuf.parse(ticker24hProto, root);

 // Export message types
 const SubmitHistoricalRequestType = root.lookupType('SubmitHistoricalRequest');
 const SubmitResponseType = root.lookupType('SubmitResponse');
 const HistoryReadyNotificationType = root.lookupType('HistoryReadyNotification');
 const OHLCType = root.lookupType('OHLC');
+const Ticker24hType = root.lookupType('Ticker24h');

 /**
 * Encode SubmitHistoricalRequest to ZMQ frames
@@ -198,6 +234,62 @@ export function decodeHistoryReadyNotification(frames: Buffer[]): HistoryReadyNo
  };
 }

+/**
+ * Decode a Ticker24h snapshot from ZMQ SUB frames.
+ * Frame layout: [topic][version][0x0D Ticker24h type + Ticker24h protobuf bytes]
+ *
+ * Returns null if the topic doesn't match the ticker24h pattern or decoding fails.
+ */
+export function decodeTicker24h(frames: Buffer[]): Ticker24hSnapshot | null {
+  if (frames.length < 3) return null;
+
+  const topic = frames[0].toString();
+  const match = TICKER24H_TOPIC_PATTERN.exec(topic);
+  if (!match) return null;
+
+  const messageFrame = frames[2];
+  if (messageFrame[0] !== 0x0D) return null; // Must be TICKER_24H type
+
+  try {
+    const payloadBuffer = messageFrame.slice(1);
+    const decoded = Ticker24hType.decode(payloadBuffer);
+    const snapshot = Ticker24hType.toObject(decoded, {
+      longs: String,
+      defaults: false,
+    });
+
+    const tickers: Ticker24hStats[] = (snapshot.tickers ?? []).map((ts: any) => {
+      const row: Ticker24hStats = {
+        ticker: ts.ticker ?? '',
+        exchange_id: ts.exchangeId ?? '',
+        base_asset: ts.baseAsset ?? '',
+        quote_asset: ts.quoteAsset ?? '',
+        last_price: Number(ts.lastPrice ?? 0),
+        price_change_pct: Number(ts.priceChangePct ?? 0),
+        quote_volume_24h: Number(ts.quoteVolume24H ?? 0),
+        timestamp_ms: Math.round(Number(BigInt(ts.timestamp ?? '0')) / 1e6),
+      };
+      if (ts.bidPrice != null)       row.bid_price = Number(ts.bidPrice);
+      if (ts.askPrice != null)       row.ask_price = Number(ts.askPrice);
+      if (ts.open24H != null)        row.open_24h = Number(ts.open24H);
+      if (ts.high24H != null)        row.high_24h = Number(ts.high24H);
+      if (ts.low24H != null)         row.low_24h = Number(ts.low24H);
+      if (ts.volume24H != null)      row.volume_24h = Number(ts.volume24H);
+      if (ts.stdQuoteVolume != null) row.std_quote_volume = Number(ts.stdQuoteVolume);
+      if (ts.numTrades != null)      row.num_trades = Number(ts.numTrades);
+      return row;
+    });
+
+    return {
+      exchange_id: snapshot.exchangeId ?? match[1],
+      tickers,
+      generated_at_ms: Math.round(Number(BigInt(snapshot.generatedAt ?? '0')) / 1e6),
+    };
+  } catch (e) {
+    return null;
+  }
+}
+
 /**
 * Decode a realtime OHLC bar from ZMQ SUB frames.
 * Frame layout: [topic][version][0x04 OHLC type + OHLC protobuf bytes]
@@ -213,6 +305,7 @@ export function decodeRealtimeBar(frames: Buffer[]): RealtimeBar | null {

  const ticker = match[1];
  const periodSeconds = parseInt(match[2], 10);
+  const isClosed = !match[3]; // ":open" suffix absent → closed bar

  const messageFrame = frames[2];
  if (messageFrame[0] !== 0x04) return null; // Must be OHLC type
@@ -231,5 +324,6 @@ export function decodeRealtimeBar(frames: Buffer[]): RealtimeBar | null {
    low: Number(ohlc.low ?? 0),
    close: Number(ohlc.close ?? 0),
    volume: Number(ohlc.volume ?? 0),
+    isClosed,
  };
 }
--- a/gateway/src/clients/zmq-relay-client.ts
+++ b/gateway/src/clients/zmq-relay-client.ts
@@ -18,8 +18,11 @@ import {
  decodeSubmitResponse,
  decodeHistoryReadyNotification,
  decodeRealtimeBar,
+  decodeTicker24h,
  OHLC_BAR_TOPIC_PATTERN,
+  TICKER24H_TOPIC_PATTERN,
  type RealtimeBar,
+  type Ticker24hSnapshot,
 } from './zmq-protocol.js';
 import type {
  SubmitHistoricalRequest,
@@ -31,7 +34,8 @@ import {
 } from '../types/ohlc.js';

 export type BarUpdateCallback = (bar: RealtimeBar) => void;
-export type { RealtimeBar };
+export type Ticker24hCallback = (snapshot: Ticker24hSnapshot) => void;
+export type { RealtimeBar, Ticker24hSnapshot };

 export interface ZMQRelayConfig {
  relayRequestEndpoint: string;       // e.g., "tcp://relay:5559"
@@ -39,6 +43,7 @@ export interface ZMQRelayConfig {
  clientId?: string;                  // Optional client ID, will generate if not provided
  requestTimeout?: number;            // Request timeout in ms (default: 120000)
  onMetadataUpdate?: () => Promise<void>; // Callback when symbol metadata updates
+  onTicker24h?: (snapshot: Ticker24hSnapshot) => void; // Callback when Ticker24h snapshot arrives
 }

 interface PendingRequest {
@@ -79,6 +84,7 @@ export class ZMQRelayClient {
      clientId: config.clientId || `gateway-${randomUUID().slice(0, 8)}`,
      requestTimeout: config.requestTimeout || 120000,
      onMetadataUpdate: config.onMetadataUpdate || (async () => {}),
+      onTicker24h: config.onTicker24h || (() => {}),
    };
    this.logger = logger;
    this.notificationTopic = `RESPONSE:${this.config.clientId}`;
@@ -275,6 +281,17 @@ export class ZMQRelayClient {
              continue;
            }

+            // Handle Ticker24h snapshot updates (topic pattern: "{exchange}|ticker24h")
+            if (TICKER24H_TOPIC_PATTERN.test(topic)) {
+              if (this.config.onTicker24h) {
+                const snapshot = decodeTicker24h(Array.from(frames));
+                if (snapshot) {
+                  try { this.config.onTicker24h(snapshot); } catch (e) { /* ignore callback errors */ }
+                }
+              }
+              continue;
+            }
+
            // Handle realtime OHLC bar updates (topic pattern: "{ticker}|ohlc:{period}")
            if (OHLC_BAR_TOPIC_PATTERN.test(topic)) {
              const bar = decodeRealtimeBar(Array.from(frames));
@@ -339,9 +356,12 @@ export class ZMQRelayClient {
   * This triggers the relay XPUB → Flink subscription detection → ingestor activation.
   *
   * @param callback  Called whenever a new bar arrives for this topic
+   * @param openBars  If true, subscribe to the ":open" topic (live in-progress bar updates
+   *                  for charts). If false (default), subscribe to closed bars only
+   *                  (completed candles for strategies/triggers).
   */
-  subscribeToTicker(ticker: string, periodSeconds: number, callback: BarUpdateCallback): void {
-    const topic = `${ticker}|ohlc:${periodSeconds}`;
+  subscribeToTicker(ticker: string, periodSeconds: number, callback: BarUpdateCallback, openBars = false): void {
+    const topic = `${ticker}|ohlc:${periodSeconds}${openBars ? ':open' : ''}`;

    // Register callback
    if (!this.barCallbacks.has(topic)) {
@@ -361,9 +381,10 @@ export class ZMQRelayClient {
  /**
   * Unsubscribe a callback from realtime OHLC bars.
   * ZMQ unsubscribe is only called on the 1→0 transition (last subscriber).
+   * @param openBars  Must match the value used in the corresponding subscribeToTicker call.
   */
-  unsubscribeFromTicker(ticker: string, periodSeconds: number, callback: BarUpdateCallback): void {
-    const topic = `${ticker}|ohlc:${periodSeconds}`;
+  unsubscribeFromTicker(ticker: string, periodSeconds: number, callback: BarUpdateCallback, openBars = false): void {
+    const topic = `${ticker}|ohlc:${periodSeconds}${openBars ? ':open' : ''}`;

    const callbacks = this.barCallbacks.get(topic);
    if (callbacks) {
@@ -385,13 +406,25 @@ export class ZMQRelayClient {
    }
  }

+  /**
+   * Subscribe to Ticker24h snapshots for an exchange.
+   * Only calls ZMQ subscribe — receipt is handled via the onTicker24h config callback.
+   */
+  subscribeToTicker24h(exchange: string): void {
+    const topic = `${exchange.toUpperCase()}|ticker24h`;
+    if (this.subSocket) {
+      this.subSocket.subscribe(topic);
+      this.logger.info({ topic }, 'ZMQ subscribed to Ticker24h topic');
+    }
+  }
+
  /**
   * Remove all subscriptions for a set of (topic, callback) pairs.
   * Convenience method for WebSocket disconnect cleanup.
   */
-  cleanupSubscriptions(subscriptions: Array<{ ticker: string; periodSeconds: number; callback: BarUpdateCallback }>): void {
-    for (const { ticker, periodSeconds, callback } of subscriptions) {
-      this.unsubscribeFromTicker(ticker, periodSeconds, callback);
+  cleanupSubscriptions(subscriptions: Array<{ ticker: string; periodSeconds: number; callback: BarUpdateCallback; openBars?: boolean }>): void {
+    for (const { ticker, periodSeconds, callback, openBars } of subscriptions) {
+      this.unsubscribeFromTicker(ticker, periodSeconds, callback, openBars ?? false);
    }
  }

--- a/gateway/src/harness/spawn/spawn-service.ts
+++ b/gateway/src/harness/spawn/spawn-service.ts
@@ -2,7 +2,7 @@ import type { BaseChatModel } from '@langchain/core/language_models/chat_models'
 import { SystemMessage, HumanMessage } from '@langchain/core/messages';

 /** All platform tool names available to every subagent. */
-const ALL_PLATFORM_TOOLS = ['SymbolLookup', 'GetChartData', 'WebSearch', 'FetchPage', 'ArxivSearch'];
+const ALL_PLATFORM_TOOLS = ['SymbolLookup', 'GetChartData', 'GetTicker24h', 'WebSearch', 'FetchPage', 'ArxivSearch'];
 import type { FastifyBaseLogger } from 'fastify';
 import { createReactAgent } from '@langchain/langgraph/prebuilt';
 import type { HarnessEvent, SubagentChunkEvent, SubagentThinkingEvent } from '../harness-events.js';
--- a/gateway/src/harness/tool-labels.ts
+++ b/gateway/src/harness/tool-labels.ts
@@ -9,6 +9,7 @@ const TOOL_LABELS: Record<string, string> = {
  MemoryLookup: 'Checking docs...',
  memory_lookup: 'Checking docs...',
  GetChartData: 'Fetching chart data...',
+  GetTicker24h: 'Fetching market data...',
  SymbolLookup: 'Searching symbol...',
  WebSearch: 'Searching the web...',
  FetchPage: 'Fetching page...',
--- a/gateway/src/main.ts
+++ b/gateway/src/main.ts
@@ -13,7 +13,7 @@ import { WebSocketHandler } from './channels/websocket-handler.js';
 import { TelegramHandler } from './channels/telegram-handler.js';
 import { KubernetesClient } from './k8s/client.js';
 import { ContainerManager } from './k8s/container-manager.js';
-import { ZMQRelayClient } from './clients/zmq-relay-client.js';
+import { ZMQRelayClient, type Ticker24hSnapshot } from './clients/zmq-relay-client.js';
 import { IcebergClient } from './clients/iceberg-client.js';
 import { ConversationStore } from './harness/memory/conversation-store.js';
 import { BlobStore } from './harness/memory/blob-store.js';
@@ -141,10 +141,13 @@ function loadConfig() {
      conversationsBucket: configData.iceberg?.conversations_bucket || process.env.CONVERSATIONS_S3_BUCKET,
    },

-    // Relay configuration (for historical data)
+    // Relay configuration (for historical data and market snapshots)
    relay: {
      requestEndpoint: configData.relay?.request_endpoint || process.env.RELAY_REQUEST_ENDPOINT || 'tcp://relay:5559',
      notificationEndpoint: configData.relay?.notification_endpoint || process.env.RELAY_NOTIFICATION_ENDPOINT || 'tcp://relay:5558',
+      // Exchanges to subscribe for Ticker24h snapshots
+      supportedExchanges: (configData.relay?.supported_exchanges || process.env.RELAY_SUPPORTED_EXCHANGES || 'BINANCE')
+        .split(',').map((s: string) => s.trim().toUpperCase()).filter(Boolean) as string[],
    },

    // Kubernetes configuration
@@ -258,12 +261,28 @@ const onMetadataUpdate = async () => {
  }
 };

-// Initialize ZMQ Relay client (for historical data)
-// Pass onMetadataUpdate callback so it's registered before connection
+// Ticker24h in-memory cache (primary serving layer; Redis is warm-start only)
+const ticker24hCache = new Map<string, Ticker24hSnapshot>();
+
+const TICKER24H_REDIS_TTL = 5400; // 90 minutes
+
+function onTicker24hReceived(snapshot: Ticker24hSnapshot): void {
+  const exchange = snapshot.exchange_id;
+  ticker24hCache.set(exchange, snapshot);
+  app.log.info({ exchange, count: snapshot.tickers.length }, 'Ticker24h snapshot updated in memory');
+
+  // Write to Redis as JSON (fire-and-forget warm-start cache)
+  redis.setex(`ticker24h:${exchange}`, TICKER24H_REDIS_TTL, JSON.stringify(snapshot))
+    .catch(err => app.log.warn({ exchange, err }, 'Failed to write Ticker24h to Redis'));
+}
+
+// Initialize ZMQ Relay client (for historical data and market snapshots)
+// Pass onMetadataUpdate and onTicker24h callbacks so they're registered before connection
 const zmqRelayClient = new ZMQRelayClient({
  relayRequestEndpoint: config.relay.requestEndpoint,
  relayNotificationEndpoint: config.relay.notificationEndpoint,
  onMetadataUpdate,
+  onTicker24h: onTicker24hReceived,
 }, app.log);

 app.log.info({
@@ -478,6 +497,24 @@ try {
  try {
    await zmqRelayClient.connect();
    app.log.info('ZMQ Relay connected');
+
+    // Subscribe to Ticker24h topics for all configured exchanges
+    for (const exchange of config.relay.supportedExchanges) {
+      zmqRelayClient.subscribeToTicker24h(exchange);
+    }
+
+    // Warm Ticker24h in-memory cache from Redis (best-effort; gateway ZMQ is the primary source)
+    for (const exchange of config.relay.supportedExchanges) {
+      try {
+        const cached = await redis.get(`ticker24h:${exchange}`);
+        if (cached) {
+          ticker24hCache.set(exchange, JSON.parse(cached));
+          app.log.info({ exchange }, 'Ticker24h warm-started from Redis');
+        }
+      } catch (err) {
+        app.log.debug({ exchange, err }, 'No Ticker24h cache in Redis (will populate on first ZMQ update)');
+      }
+    }
  } catch (error) {
    app.log.warn({ error }, 'ZMQ Relay connection failed - historical data will not be available');
  }
@@ -490,6 +527,7 @@ try {
      ohlcService: () => ohlcService,
      symbolIndexService: () => symbolIndexService,
      workspaceManager: undefined, // Will be set per-session
+      ticker24hGetter: (exchange: string) => ticker24hCache.get(exchange),
      tavilyApiKey: config.tavilyApiKey,
    });

@@ -497,7 +535,7 @@ try {
    // Main agent: platform tools + user's general MCP tools
    toolRegistry.registerAgentTools({
      agentName: 'main',
-      platformTools: ['SymbolLookup', 'GetChartData'],
+      platformTools: ['SymbolLookup', 'GetChartData', 'GetTicker24h'],
      mcpTools: ['PythonList', 'PythonDelete', 'BacktestStrategy', 'ListActiveStrategies'],
    });

@@ -548,6 +586,7 @@ try {
      const indexService = new SymbolIndexService({
        icebergClient,
        logger: app.log,
+        getTicker24h: (exchange: string) => ticker24hCache.get(exchange),
      });

      // Assign to module-level variable so onMetadataUpdate callback can use it
--- a/gateway/src/services/ohlc-service.ts
+++ b/gateway/src/services/ohlc-service.ts
@@ -20,8 +20,6 @@ import type { ZMQRelayClient, BarUpdateCallback } from '../clients/zmq-relay-cli
 export type { BarUpdateCallback } from '../clients/zmq-relay-client.js';
 import type {
  HistoryResult,
-  SymbolInfo,
-  SearchResult,
  DatafeedConfig,
  TradingViewBar,
 } from '../types/ohlc.js';
@@ -58,17 +56,21 @@ export class OHLCService {
   * Subscribe to realtime OHLC bar updates for a ticker+period.
   * ZMQ subscribe is issued on the first call for a given topic; subsequent calls
   * for the same topic only add the callback (no extra ZMQ events).
+   *
+   * @param openBars  If true, subscribe to in-progress bar snapshots (every tick, for charts).
+   *                  If false (default), subscribe to closed bars only (for strategies/triggers).
   */
-  subscribeToTicker(ticker: string, periodSeconds: number, callback: BarUpdateCallback): void {
-    this.relayClient.subscribeToTicker(ticker, periodSeconds, callback);
+  subscribeToTicker(ticker: string, periodSeconds: number, callback: BarUpdateCallback, openBars = false): void {
+    this.relayClient.subscribeToTicker(ticker, periodSeconds, callback, openBars);
  }

  /**
   * Unsubscribe a callback from realtime OHLC bar updates.
   * ZMQ unsubscribe is issued when the last callback for a topic is removed.
+   * @param openBars  Must match the value used in the corresponding subscribeToTicker call.
   */
-  unsubscribeFromTicker(ticker: string, periodSeconds: number, callback: BarUpdateCallback): void {
-    this.relayClient.unsubscribeFromTicker(ticker, periodSeconds, callback);
+  unsubscribeFromTicker(ticker: string, periodSeconds: number, callback: BarUpdateCallback, openBars = false): void {
+    this.relayClient.unsubscribeFromTicker(ticker, periodSeconds, callback, openBars);
  }

  /**
@@ -223,66 +225,4 @@ export class OHLCService {
      supports_time: false,
    };
  }
-
-  /**
-   * Search symbols
-   *
-   * For now, stub with default symbol
-   */
-  async searchSymbols(
-    query: string,
-    type?: string,
-    exchange?: string,
-    limit: number = 30
-  ): Promise<SearchResult[]> {
-    this.logger.debug({ query, type, exchange, limit }, 'Searching symbols');
-
-    // TODO: Implement central symbol registry
-    // For now, return default symbol if query matches
-    if (query.toLowerCase().includes('btc') || query.toLowerCase().includes('binance')) {
-      return [{
-        symbol: 'BTC/USDT',
-        full_name: 'BTC/USDT (BINANCE)',
-        description: 'Bitcoin / Tether USD',
-        exchange: 'BINANCE',
-        ticker: 'BTC/USDT.BINANCE',
-        type: 'crypto',
-      }];
-    }
-
-    return [];
-  }
-
-  /**
-   * Resolve symbol metadata
-   *
-   * For now, stub with default symbol
-   */
-  async resolveSymbol(symbol: string): Promise<SymbolInfo> {
-    this.logger.debug({ symbol }, 'Resolving symbol');
-
-    // TODO: Implement central symbol registry
-    // For now, return default symbol info for BTC/USDT.BINANCE
-    if (symbol === 'BTC/USDT.BINANCE' || symbol === 'BTC/USDT') {
-      return {
-        symbol: 'BTC/USDT',
-        name: 'BTC/USDT',
-        ticker: 'BTC/USDT.BINANCE',
-        description: 'Bitcoin / Tether USD',
-        type: 'crypto',
-        session: '24x7',
-        timezone: 'Etc/UTC',
-        exchange: 'BINANCE',
-        minmov: 1,
-        pricescale: 100,
-        has_intraday: true,
-        has_daily: true,
-        has_weekly_and_monthly: true,
-        supported_resolutions: DEFAULT_SUPPORTED_RESOLUTIONS,
-        data_status: 'streaming',
-      };
-    }
-
-    throw new Error(`Symbol not found: ${symbol}`);
-  }
 }
--- a/gateway/src/services/symbol-index-service.ts
+++ b/gateway/src/services/symbol-index-service.ts
@@ -7,12 +7,14 @@

 import type { FastifyBaseLogger } from 'fastify';
 import type { IcebergClient } from '../clients/iceberg-client.js';
+import type { Ticker24hSnapshot } from '../clients/zmq-relay-client.js';
 import type { SearchResult, SymbolInfo, SymbolMetadata } from '../types/ohlc.js';
 import { DEFAULT_SUPPORTED_RESOLUTIONS } from '../types/ohlc.js';

 export interface SymbolIndexServiceConfig {
  icebergClient: IcebergClient;
  logger: FastifyBaseLogger;
+  getTicker24h?: (exchange: string) => Ticker24hSnapshot | undefined;
 }

 /**
@@ -23,6 +25,7 @@ export interface SymbolIndexServiceConfig {
 export class SymbolIndexService {
  private icebergClient: IcebergClient;
  private logger: FastifyBaseLogger;
+  private getTicker24h?: (exchange: string) => Ticker24hSnapshot | undefined;
  private symbols: Map<string, SymbolMetadata> = new Map(); // key: "MARKET_ID.EXCHANGE" (Nautilus format)
  private initialized: boolean = false;
  private initPromise: Promise<void> | null = null;
@@ -30,6 +33,7 @@ export class SymbolIndexService {
  constructor(config: SymbolIndexServiceConfig) {
    this.icebergClient = config.icebergClient;
    this.logger = config.logger;
+    this.getTicker24h = config.getTicker24h;
  }

  /**
@@ -114,10 +118,9 @@ export class SymbolIndexService {
    }

    const queryLower = query.toLowerCase();
-    const results: SearchResult[] = [];
+    const matched: SymbolMetadata[] = [];

    for (const [key, metadata] of this.symbols) {
-      // Match against various fields
      const ticker = key;
      const base = metadata.base_asset || '';
      const quote = metadata.quote_asset || '';
@@ -131,15 +134,36 @@ export class SymbolIndexService {
        desc.toLowerCase().includes(queryLower) ||
        marketId.toLowerCase().includes(queryLower)
      ) {
-        results.push(this.metadataToSearchResult(metadata));
+        matched.push(metadata);
+      }
+    }

-        if (results.length >= limit) {
-          break;
+    // Build a volume lookup from Ticker24h cache keyed by "ticker" field (e.g. "BTC/USDT")
+    // within each exchange snapshot. Map: "MARKET_ID.EXCHANGE" → std_quote_volume
+    const volumeMap = new Map<string, number>();
+    if (this.getTicker24h) {
+      const exchanges = new Set(matched.map(m => m.exchange_id));
+      for (const exchange of exchanges) {
+        const snapshot = this.getTicker24h(exchange);
+        if (snapshot) {
+          for (const ts of snapshot.tickers) {
+            const key = `${ts.ticker}.${exchange}`;
+            const vol = ts.std_quote_volume ?? ts.quote_volume_24h ?? 0;
+            volumeMap.set(key, vol);
+          }
        }
      }
    }

-    this.logger.debug({ query, count: results.length }, 'Symbol search completed');
+    matched.sort((a, b) => {
+      const ka = `${a.market_id}.${a.exchange_id}`;
+      const kb = `${b.market_id}.${b.exchange_id}`;
+      return (volumeMap.get(kb) ?? 0) - (volumeMap.get(ka) ?? 0);
+    });
+
+    const results = matched.slice(0, limit).map(m => this.metadataToSearchResult(m));
+
+    this.logger.debug({ query, matched: matched.length, returned: results.length }, 'Symbol search completed');
    return results;
  }

--- a/gateway/src/tools/platform/get-ticker24h.tool.ts
+++ b/gateway/src/tools/platform/get-ticker24h.tool.ts
@@ -0,0 +1,90 @@
+import { DynamicStructuredTool } from '@langchain/core/tools';
+import { z } from 'zod';
+import type { FastifyBaseLogger } from 'fastify';
+import type { Ticker24hSnapshot } from '../../clients/zmq-relay-client.js';
+
+export interface GetTicker24hToolConfig {
+  getTicker24h: (exchange: string) => Ticker24hSnapshot | undefined;
+  logger: FastifyBaseLogger;
+}
+
+export function createGetTicker24hTool(config: GetTicker24hToolConfig): DynamicStructuredTool {
+  const { getTicker24h, logger } = config;
+
+  return new DynamicStructuredTool({
+    name: 'GetTicker24h',
+    description: `Retrieve 24h rolling market stats for all symbols on an exchange. Data is refreshed hourly. Returns symbols sorted by USD volume (std_quote_volume) descending.
+
+Use this to build a pre-filtered symbol universe before fetching OHLC data for a scanner — it avoids requesting per-symbol OHLC data for thousands of symbols and consuming the bar budget.
+
+Returned columns per symbol: ticker, exchange_id, base_asset, quote_asset, last_price, price_change_pct, quote_volume_24h, std_quote_volume (USD-normalized, null if unknown), bid_price, ask_price, open_24h, high_24h, low_24h, volume_24h, num_trades, timestamp_ms.
+
+Parameters:
+- exchange: Exchange name (BINANCE, COINBASE, or KRAKEN)
+- limit (optional): Top N by volume. If omitted, returns all symbols.
+- min_std_quote_volume (optional): Minimum USD-normalized 24h volume; excludes symbols below this threshold.
+- market_type (optional): "spot" or "perp" (perpetual futures). If omitted, returns all.
+- base_asset_contains (optional): Filter to symbols whose base asset contains this string (case-insensitive), e.g. "BTC".`,
+    schema: z.object({
+      exchange: z.string().describe('Exchange name: BINANCE, COINBASE, or KRAKEN'),
+      limit: z.number().int().optional().describe('Top N By Volume. If omitted, returns all symbols.'),
+      min_std_quote_volume: z.number().optional().describe('Minimum USD-normalized 24h volume. Excludes symbols below this threshold.'),
+      market_type: z.enum(['spot', 'perp']).optional().describe('Filter by market type: spot or perp. Omit for all.'),
+      base_asset_contains: z.string().optional().describe('Filter to symbols whose base asset contains this string (case-insensitive). E.g. "BTC".'),
+    }),
+    func: async ({ exchange, limit, min_std_quote_volume, market_type, base_asset_contains }) => {
+      const exchangeUpper = exchange.toUpperCase();
+      logger.debug({ exchange: exchangeUpper, limit, min_std_quote_volume, market_type, base_asset_contains }, 'GetTicker24h called');
+
+      const snapshot = getTicker24h(exchangeUpper);
+      if (!snapshot) {
+        return JSON.stringify({
+          exchange: exchangeUpper,
+          count: 0,
+          tickers: [],
+          note: 'No data available. Ticker24h is refreshed hourly — it may not be ready yet.',
+        });
+      }
+
+      let tickers = snapshot.tickers;
+
+      if (market_type === 'spot') {
+        tickers = tickers.filter(t => !t.ticker.includes(':'));
+      } else if (market_type === 'perp') {
+        tickers = tickers.filter(t => t.ticker.includes(':'));
+      }
+
+      if (base_asset_contains) {
+        const lower = base_asset_contains.toLowerCase();
+        tickers = tickers.filter(t => t.base_asset.toLowerCase().includes(lower));
+      }
+
+      if (min_std_quote_volume !== undefined) {
+        tickers = tickers.filter(
+          t => t.std_quote_volume !== undefined && !isNaN(t.std_quote_volume) && t.std_quote_volume >= min_std_quote_volume
+        );
+      }
+
+      // Sort by std_quote_volume descending (null/undefined/NaN last)
+      tickers = [...tickers].sort((a, b) => {
+        const av = a.std_quote_volume;
+        const bv = b.std_quote_volume;
+        if (av === undefined || av === null || isNaN(av)) return 1;
+        if (bv === undefined || bv === null || isNaN(bv)) return -1;
+        return bv - av;
+      });
+
+      if (limit !== undefined) {
+        tickers = tickers.slice(0, limit);
+      }
+
+      logger.info({ exchange: exchangeUpper, returned: tickers.length }, 'GetTicker24h result');
+
+      return JSON.stringify({
+        exchange: exchangeUpper,
+        count: tickers.length,
+        tickers,
+      });
+    },
+  });
+}
--- a/gateway/src/tools/tool-registry.ts
+++ b/gateway/src/tools/tool-registry.ts
@@ -4,8 +4,10 @@ import type { MCPClientConnector } from '../harness/mcp-client.js';
 import type { OHLCService } from '../services/ohlc-service.js';
 import type { SymbolIndexService } from '../services/symbol-index-service.js';
 import type { WorkspaceManager } from '../workspace/workspace-manager.js';
+import type { Ticker24hSnapshot } from '../clients/zmq-relay-client.js';
 import { createSymbolLookupTool } from './platform/symbol-lookup.tool.js';
 import { createGetChartDataTool } from './platform/get-chart-data.tool.js';
+import { createGetTicker24hTool } from './platform/get-ticker24h.tool.js';
 import { createWebSearchTool } from './platform/web-search.tool.js';
 import { createFetchPageTool } from './platform/fetch-page.tool.js';
 import { createArxivSearchTool } from './platform/arxiv-search.tool.js';
@@ -34,6 +36,7 @@ export interface PlatformServices {
  ohlcService?: OHLCService | (() => OHLCService | undefined);
  symbolIndexService?: SymbolIndexService | (() => SymbolIndexService | undefined);
  workspaceManager?: WorkspaceManager | (() => WorkspaceManager | undefined);
+  ticker24hGetter?: (exchange: string) => Ticker24hSnapshot | undefined;
  tavilyApiKey?: string;
 }

@@ -185,6 +188,18 @@ export class ToolRegistry {
        break;
      }

+      case 'GetTicker24h': {
+        if (this.platformServices.ticker24hGetter) {
+          tool = createGetTicker24hTool({
+            getTicker24h: this.platformServices.ticker24hGetter,
+            logger: this.logger,
+          });
+        } else {
+          this.logger.warn('ticker24hGetter not configured — GetTicker24h tool unavailable');
+        }
+        break;
+      }
+
      case 'WebSearch': {
        if (this.platformServices.tavilyApiKey) {
          tool = createWebSearchTool({ apiKey: this.platformServices.tavilyApiKey, logger: this.logger });
--- a/ingestor/src/ccxt-fetcher.js
+++ b/ingestor/src/ccxt-fetcher.js
@@ -462,6 +462,80 @@ export class CCXTFetcher {
    return timeframe;
  }

+  /**
+   * Fetch 24h rolling ticker stats for all symbols on an exchange.
+   * Uses exchange.fetchTickers() — single API call, very rate-limit efficient.
+   * Returns an array of TickerStats-compatible objects, or throws if unsupported.
+   *
+   * @param {string} exchangeName - lowercase exchange name (e.g. "binance")
+   * @returns {Promise<Array>} Array of TickerStats objects
+   */
+  async fetchAllTickers(exchangeName) {
+    const exchange = this.getExchange(exchangeName);
+    const exchangeUpper = exchangeName.toUpperCase();
+
+    if (!exchange.has['fetchTickers']) {
+      throw new Error(`Exchange ${exchangeUpper} does not support fetchTickers()`);
+    }
+
+    this.logger.info({ exchange: exchangeUpper }, 'Fetching all 24h tickers');
+
+    let rawTickers;
+    try {
+      rawTickers = await exchange.fetchTickers();
+    } catch (error) {
+      if (error.constructor?.name === 'RateLimitExceeded') {
+        const retryAfterMs = extractRetryAfterMs(exchange, error);
+        this.logger.warn({ exchange: exchangeUpper, retryAfterMs }, 'fetchTickers rate-limited');
+        throw new ExchangeRateLimitError(exchangeName, retryAfterMs, error.message);
+      }
+      this.logger.error({ error: error.message, exchange: exchangeUpper }, 'Error fetching tickers');
+      throw error;
+    }
+
+    const nowNs = (BigInt(Date.now()) * 1_000_000n).toString();
+    const tickers = [];
+
+    for (const [symbol, t] of Object.entries(rawTickers)) {
+      if (!t || t.last == null) continue;
+
+      // Build Nautilus-format ticker: "BASE/QUOTE.EXCHANGE"
+      const ticker = `${symbol}.${exchangeUpper}`;
+
+      // Extract base/quote from the CCXT market info
+      const market = exchange.markets?.[symbol];
+      const baseAsset = market?.base ?? symbol.split('/')[0] ?? '';
+      const quoteAsset = market?.quote ?? symbol.split('/')[1] ?? '';
+
+      // protobufjs camelCase: only removes '_' before LETTERS, not digits.
+      // quote_volume_24h → quoteVolume_24h  (underscore before '24' is preserved)
+      // open_24h → open_24h, high_24h → high_24h, etc.
+      const stat = {
+        ticker,
+        exchangeId: exchangeUpper,
+        baseAsset,
+        quoteAsset,
+        lastPrice: t.last ?? 0,
+        priceChangePct: t.percentage ?? 0,
+        'quoteVolume_24h': t.quoteVolume ?? 0,
+        timestamp: nowNs,
+      };
+
+      if (t.bid != null) stat.bidPrice = t.bid;
+      if (t.ask != null) stat.askPrice = t.ask;
+      if (t.open != null) stat['open_24h'] = t.open;
+      if (t.high != null) stat['high_24h'] = t.high;
+      if (t.low != null) stat['low_24h'] = t.low;
+      if (t.baseVolume != null) stat['volume_24h'] = t.baseVolume;
+      if (t.info?.count != null) stat.numTrades = Number(t.info.count);
+
+      tickers.push(stat);
+    }
+
+    this.logger.info({ exchange: exchangeUpper, count: tickers.length }, 'Fetched all tickers');
+    return tickers;
+  }
+
  /**
   * Close all exchange connections
   */
--- a/ingestor/src/index.js
+++ b/ingestor/src/index.js
@@ -57,6 +57,7 @@ function loadConfig() {
    kafka_brokers: config.kafka_brokers || ['localhost:9092'],
    kafka_ohlc_topic: config.kafka_ohlc_topic || 'market-ohlc',
    kafka_tick_topic: config.kafka_tick_topic || 'market-tick',
+    kafka_ticker_topic: config.kafka_ticker_topic || 'market-ticker',

    // Worker configuration
    poll_interval_ms: config.poll_interval_ms || 10000,
@@ -316,6 +317,7 @@ class IngestorWorker {

    const isHistorical = !type || type === 'HISTORICAL_OHLC' || type === 0;
    const isRealtime = type === 'REALTIME_TICKS' || type === 1;
+    const isTickerSnapshot = type === 'TICKER_SNAPSHOT' || type === 2;

    if (isHistorical) {
      if (!this.pool.consumeSlot(jobId, exchange, 'HISTORICAL')) {
@@ -331,6 +333,14 @@ class IngestorWorker {
        return;
      }
      this.handleRealtimeRequest(request);
+    } else if (isTickerSnapshot) {
+      if (!this.pool.consumeSlot(jobId, exchange, 'HISTORICAL')) {
+        this.zmqClient.sendReject(jobId, 'Slot capacity exceeded').catch(() => {});
+        return;
+      }
+      this.handleTicker24hRequest(request).catch(err => {
+        this.logger.error({ jobId, requestId, error: err.message }, 'Unexpected error in ticker24h handler');
+      });
    } else {
      this.logger.warn({ jobId, type }, 'Unknown request type — rejecting');
      this.zmqClient.sendReject(jobId, `Unknown request type: ${type}`).catch(() => {});
@@ -430,6 +440,44 @@ class IngestorWorker {
    this.realtimePoller.startSubscription(jobId, requestId, ticker, this.config.kafka_tick_topic);
  }

+  /**
+   * Fetch all tickers (24h stats) for an exchange and write to Kafka.
+   * Triggered by TICKER_SNAPSHOT request with sentinel ticker @TICKER24H.{EXCHANGE}.
+   */
+  async handleTicker24hRequest(request) {
+    const { jobId, requestId, ticker, clientId } = request;
+    const exchangeId = exchangeOf(ticker); // e.g. "BINANCE" from "@TICKER24H.BINANCE"
+    const exchangeName = exchangeId.toLowerCase();
+
+    this.logger.info({ jobId, requestId, ticker, exchangeId }, 'Processing TICKER_SNAPSHOT request');
+
+    // Immediately ack to reset Flink's dispatch-time timeout clock.
+    await this.zmqClient.sendHeartbeat(jobId);
+
+    try {
+      const tickers = await this.ccxtFetcher.fetchAllTickers(exchangeName);
+
+      this.logger.info({ jobId, requestId, exchangeId, count: tickers.length }, 'Fetched tickers from exchange');
+
+      await this.kafkaProducer.writeTickerBatch(this.config.kafka_ticker_topic, exchangeId, tickers, clientId, requestId);
+
+      this.logger.info({ jobId, requestId, exchangeId }, 'Ticker24h request complete — sending WorkComplete');
+      await this.zmqClient.sendComplete(jobId, true);
+
+    } catch (error) {
+      this.logger.error({ jobId, requestId, exchangeId, error: error.message }, 'Ticker24h request failed');
+
+      if (error instanceof ExchangeRateLimitError) {
+        this.pool.reportRateLimit(exchangeId, 'HISTORICAL', error.retryAfterMs);
+      }
+
+      await this.zmqClient.sendComplete(jobId, false, error.message);
+    }
+
+    this.pool.releaseSlot(jobId).catch(err =>
+      this.logger.error({ jobId, error: err.message }, 'Failed to release ticker24h slot'));
+  }
+
  getStatus() {
    return {
      activeRealtime: this.activeRealtime.size,
--- a/ingestor/src/kafka-producer.js
+++ b/ingestor/src/kafka-producer.js
@@ -1,6 +1,6 @@
 // Kafka producer for writing market data
 import { Kafka } from 'kafkajs';
-import { encodeMessage, MessageTypeId, Tick, OHLC, OHLCBatch, Market } from './proto/messages.js';
+import { encodeMessage, MessageTypeId, Tick, OHLC, OHLCBatch, Market, TickerBatch } from './proto/messages.js';

 export class KafkaProducer {
  constructor(config, logger) {
@@ -302,6 +302,39 @@ export class KafkaProducer {
    );
  }

+  /**
+   * Write a TickerBatch (all-ticker snapshot for one exchange) to Kafka.
+   * @param {string} topic - Kafka topic name (e.g. "market-ticker")
+   * @param {string} exchangeId - Exchange identifier (e.g. "BINANCE")
+   * @param {Array<object>} tickers - Array of TickerStats-compatible objects
+   * @param {string} [clientId] - Non-empty = client-initiated; absent = scheduled broadcast
+   * @param {string} [requestId] - Echoed for tracing
+   */
+  async writeTickerBatch(topic, exchangeId, tickers, clientId, requestId) {
+    if (!this.isConnected) {
+      throw new Error('Kafka producer not connected');
+    }
+
+    const nowNs = (BigInt(Date.now()) * 1_000_000n).toString();
+    const batch = {
+      exchangeId,
+      tickers,
+      fetchedAt: nowNs,
+    };
+    if (clientId) batch.clientId = clientId;
+    if (requestId) batch.requestId = requestId;
+
+    const [frame1, frame2] = encodeMessage(MessageTypeId.TICKER_BATCH, batch, TickerBatch);
+    const value = Buffer.concat([frame1, frame2]);
+
+    await this.producer.send({
+      topic,
+      messages: [{ key: exchangeId, value }],
+    });
+
+    this.logger.info({ exchange: exchangeId, count: tickers.length, topic }, 'Wrote TickerBatch to Kafka');
+  }
+
  /**
   * Disconnect from Kafka
   */
--- a/protobuf/ingestor.proto
+++ b/protobuf/ingestor.proto
@@ -30,6 +30,7 @@ message DataRequest {
  enum RequestType {
    HISTORICAL_OHLC = 0;
    REALTIME_TICKS = 1;
+    TICKER_SNAPSHOT = 2;
  }
 }

--- a/protobuf/ticker24h.proto
+++ b/protobuf/ticker24h.proto
@@ -0,0 +1,61 @@
+syntax = "proto3";
+
+option java_multiple_files = true;
+option java_package = "com.dexorder.proto";
+
+// Exchange rate for a single quote currency → USD conversion
+message QuoteCurrencyRate {
+  string currency = 1;       // "BTC", "ETH", "USDT", "USDC"
+  double usd_rate = 2;       // conversion rate to USD (1.0 for USD stablecoins)
+  string source_ticker = 3;  // "BTC/USDT.BINANCE" — source market used for rate
+  uint64 timestamp = 4;      // nanoseconds when rate was observed
+}
+
+// Index of quote currency → USD rates used to compute std_quote_volume.
+// Embedded in Ticker24h so consumers have full audit trail.
+message QuoteCurrencyIndex {
+  repeated QuoteCurrencyRate rates = 1;
+  uint64 generated_at = 2;  // nanoseconds
+}
+
+// 24-hour rolling market stats for a single symbol
+message TickerStats {
+  // Required: always present for any valid ticker
+  string ticker = 1;            // "BTC/USDT.BINANCE"
+  string exchange_id = 2;       // "BINANCE"
+  string base_asset = 3;        // "BTC"
+  string quote_asset = 4;       // "USDT"
+  double last_price = 5;        // last traded price in quote currency
+  double price_change_pct = 6;  // 24h price change as percentage (e.g. 2.5 = +2.5%)
+  double quote_volume_24h = 7;  // raw 24h volume in quote asset
+  uint64 timestamp = 8;         // nanoseconds, snapshot time
+
+  // Optional: not all exchanges / markets provide these
+  optional double bid_price = 9;
+  optional double ask_price = 10;
+  optional double open_24h = 11;
+  optional double high_24h = 12;
+  optional double low_24h = 13;
+  optional double volume_24h = 14;       // base-asset volume (0 is valid on tiny markets)
+  optional double std_quote_volume = 15; // quote_volume_24h normalized to USD; null if conversion unknown
+  optional uint32 num_trades = 16;       // 24h trade count (0 is valid on tiny markets)
+}
+
+// Full Ticker24h snapshot for one exchange: all symbols + currency index
+// Published via ZMQ XPUB topic: "{exchange_id}|ticker24h" (scheduled)
+//                             or "RESPONSE:{client_id}"   (client-initiated)
+message Ticker24h {
+  string exchange_id = 1;
+  repeated TickerStats tickers = 2;
+  uint64 generated_at = 3;             // nanoseconds
+  QuoteCurrencyIndex currency_index = 4;
+}
+
+// Kafka message written by ingestor after fetchTickers() call (topic: market-ticker)
+message TickerBatch {
+  string exchange_id = 1;
+  repeated TickerStats tickers = 2;
+  uint64 fetched_at = 3;               // nanoseconds
+  optional string client_id = 4;       // non-empty = client-initiated; absent = scheduled broadcast
+  optional string request_id = 5;      // echoed for tracing
+}
--- a/sandbox/RESEARCH_API_USAGE.md
+++ b/sandbox/RESEARCH_API_USAGE.md
@@ -77,6 +77,54 @@ print(df.head())
 - `"ticker"` - Market identifier
 - `"period_seconds"` - Period in seconds

+## Building a Scanner Universe with get_ticker_24h
+
+**Always pre-filter symbols before fetching OHLC for multiple tickers.** The per-script bar budget is 2M bars; fetching all ~1800 Binance symbols would exhaust it immediately. Use `get_ticker_24h` to get a ranked, filtered list of symbols with no OHLC budget cost, then run per-symbol analysis only on the filtered set.
+
+```python
+from dexorder.api import get_api
+import asyncio
+
+api = get_api()
+
+# Get top 50 most liquid Binance spot symbols by USD volume (no bar budget used)
+universe = asyncio.run(api.data.get_ticker_24h(
+    "BINANCE",
+    limit=50,
+    market_type="spot",
+    min_std_quote_volume=10_000_000  # filter to $10M+ daily USD volume
+))
+print(f"Universe: {len(universe)} symbols")
+
+# Now fetch OHLC only for the filtered set
+for ticker in universe["ticker"]:
+    df = asyncio.run(api.data.historical_ohlc(
+        ticker=ticker,
+        period_seconds=86400,  # daily bars for a scanner
+        start_time="2024-01-01",
+        end_time="2025-01-01",
+        extra_columns=["volume"]
+    ))
+    print(f"[Data] {ticker}: {len(df)} bars")
+```
+
+### Filter parameters
+
+```python
+# All BTC pairs on Binance
+df = asyncio.run(api.data.get_ticker_24h("BINANCE", base_asset_contains="BTC"))
+
+# Top 100 perp markets with $50M+ daily volume
+df = asyncio.run(api.data.get_ticker_24h(
+    "BINANCE", limit=100, market_type="perp", min_std_quote_volume=50_000_000
+))
+
+# All symbols on Coinbase
+df = asyncio.run(api.data.get_ticker_24h("COINBASE"))
+```
+
+Returned DataFrame is sorted by `std_quote_volume` (USD-normalized) descending. Symbols without a USD rate have `std_quote_volume = NaN` and appear last. Full column list: `ticker`, `exchange_id`, `base_asset`, `quote_asset`, `last_price`, `price_change_pct`, `quote_volume_24h`, `std_quote_volume`, `bid_price`, `ask_price`, `open_24h`, `high_24h`, `low_24h`, `volume_24h`, `num_trades`, `timestamp_ms`.
+
 ## Using the Charting API

 The charting API provides styled financial charts with OHLC candlesticks and technical indicators.
--- a/sandbox/dexorder/api/data_api.py
+++ b/sandbox/dexorder/api/data_api.py
@@ -1,5 +1,5 @@
 from abc import ABC, abstractmethod
-from typing import Optional, List
+from typing import Optional, List, Any

 import pandas as pd

@@ -160,3 +160,59 @@ class DataAPI(ABC):
        """
        pass

+    @abstractmethod
+    async def get_ticker_24h(
+        self,
+        exchange: str,
+        limit: Optional[int] = None,
+        min_std_quote_volume: Optional[float] = None,
+        market_type: Optional[str] = None,
+        base_asset_contains: Optional[str] = None,
+    ) -> pd.DataFrame:
+        """
+        Retrieve the 24h rolling market stats for all symbols on an exchange.
+
+        Data is refreshed hourly by the ingestor pipeline. Returns all symbols
+        sorted by std_quote_volume (USD-normalized volume) descending. Symbols
+        with unknown quote currency conversion are listed last (std_quote_volume = NaN).
+
+        Args:
+            exchange: Exchange name (e.g., "BINANCE", "COINBASE", "KRAKEN")
+            limit: If set, return only the Top N symbols By Volume. None = return all.
+            min_std_quote_volume: Exclude symbols with USD volume below this threshold.
+            market_type: Filter by market type: "spot" or "perp". None = return all.
+            base_asset_contains: Filter to symbols whose base asset contains this string
+                                  (case-insensitive). E.g., "BTC" matches "BTC/USDT".
+
+        Returns:
+            DataFrame sorted by std_quote_volume descending (NULLs last). Columns:
+            - ticker: Full ticker (e.g., "BTC/USDT.BINANCE")
+            - exchange_id: Exchange name
+            - base_asset: Base currency (e.g., "BTC")
+            - quote_asset: Quote currency (e.g., "USDT")
+            - last_price: Last traded price in quote currency
+            - price_change_pct: 24h price change as percentage
+            - quote_volume_24h: Raw 24h volume in quote asset
+            - std_quote_volume: quote_volume_24h converted to USD (NaN if conversion unknown)
+            - bid_price, ask_price: Current best bid/ask (NaN if not provided)
+            - open_24h, high_24h, low_24h: 24h OHLC prices (NaN if not provided)
+            - volume_24h: Base-asset volume (NaN if not provided)
+            - num_trades: 24h trade count (NaN if not provided)
+            - timestamp_ms: Snapshot timestamp in milliseconds
+
+            Returns empty DataFrame if no data is available (e.g., not yet fetched).
+
+        Examples:
+            # Top 50 most liquid Binance spot symbols
+            df = await api.get_ticker_24h("BINANCE", limit=50, market_type="spot")
+
+            # All BTC pairs with at least $10M daily volume
+            df = await api.get_ticker_24h("BINANCE",
+                                           base_asset_contains="BTC",
+                                           min_std_quote_volume=10_000_000)
+
+            # All Binance symbols (for building a scanner universe)
+            df = await api.get_ticker_24h("BINANCE")
+        """
+        pass
+
--- a/sandbox/dexorder/impl/data_api_impl.py
+++ b/sandbox/dexorder/impl/data_api_impl.py
@@ -8,6 +8,7 @@ import pandas as pd

 from dexorder.api.data_api import DataAPI
 from dexorder.ohlc_client import OHLCClient
+from dexorder.ticker24h_client import Ticker24hClient
 from dexorder.utils import TimestampInput, to_nanoseconds

 log = logging.getLogger(__name__)
@@ -33,6 +34,9 @@ VALID_EXTRA_COLUMNS = {
 }


+MAX_BARS_PER_SCRIPT = 2_000_000
+
+
 class DataAPIImpl(DataAPI):
    """
    Implementation of DataAPI using OHLCClient for querying OHLC data.
@@ -79,8 +83,10 @@ class DataAPIImpl(DataAPI):
            s3_secret_key=s3_secret_key,
            s3_region=s3_region,
        )
+        self.ticker24h_client = Ticker24hClient(relay_endpoint, notification_endpoint)
        self.request_timeout = request_timeout
        self._started = False
+        self._bars_fetched: int = 0

    async def start(self):
        """
@@ -91,6 +97,7 @@ class DataAPIImpl(DataAPI):
        """
        if not self._started:
            await self.ohlc_client.start()
+            await self.ticker24h_client.connect()
            self._started = True

    async def stop(self):
@@ -99,6 +106,7 @@ class DataAPIImpl(DataAPI):
        """
        if self._started:
            await self.ohlc_client.stop()
+            await self.ticker24h_client.stop()
            self._started = False

    async def historical_ohlc(
@@ -121,6 +129,17 @@ class DataAPIImpl(DataAPI):
        start_nanos = to_nanoseconds(start_time)
        end_nanos = to_nanoseconds(end_time)

+        estimated_bars = int((end_nanos - start_nanos) / (period_seconds * 1_000_000_000))
+        if self._bars_fetched + estimated_bars > MAX_BARS_PER_SCRIPT:
+            raise ValueError(
+                f"Script bar budget exceeded: {self._bars_fetched:,} bars already fetched, "
+                f"this request would add ~{estimated_bars:,} more "
+                f"(~{self._bars_fetched + estimated_bars:,} total). "
+                f"Limit is {MAX_BARS_PER_SCRIPT:,} bars per script. "
+                f"Reduce the date range, use a coarser period (e.g. 86400s instead of 3600s), "
+                f"or fetch fewer symbols."
+            )
+
        log.debug(f"Fetching OHLC: {ticker}, period={period_seconds}s, "
                  f"start={start_time} ({start_nanos}ns), end={end_time} ({end_nanos}ns)")

@@ -154,6 +173,7 @@ class DataAPIImpl(DataAPI):
        if not df.empty:
            available_cols = [col for col in columns_to_fetch if col in df.columns]
            df = df[available_cols]
+            self._bars_fetched += len(df)

        return df

@@ -173,6 +193,30 @@ class DataAPIImpl(DataAPI):
        """
        raise NotImplementedError("latest_ohlc will be implemented in the future")

+    async def get_ticker_24h(
+        self,
+        exchange: str,
+        limit: Optional[int] = None,
+        min_std_quote_volume: Optional[float] = None,
+        market_type: Optional[str] = None,
+        base_asset_contains: Optional[str] = None,
+    ) -> pd.DataFrame:
+        """
+        Retrieve the 24h rolling market stats for all symbols on an exchange.
+
+        See DataAPI.get_ticker_24h for full documentation.
+        """
+        if not self._started:
+            await self.start()
+        return await self.ticker24h_client.get_ticker_24h(
+            exchange=exchange,
+            limit=limit,
+            min_std_quote_volume=min_std_quote_volume,
+            market_type=market_type,
+            base_asset_contains=base_asset_contains,
+            request_timeout=self.request_timeout,
+        )
+
    async def __aenter__(self):
        """Support async context manager."""
        await self.start()
--- a/sandbox/dexorder/ticker24h_client.py
+++ b/sandbox/dexorder/ticker24h_client.py
@@ -0,0 +1,242 @@
+"""
+ZMQ-based client for fetching Ticker24h snapshots via the relay backbone.
+
+Sends a SubmitHistoricalRequest with ticker="@TICKER24H.{EXCHANGE}" to the relay.
+Flink processes the TICKER_SNAPSHOT job and publishes the result on
+"RESPONSE:{client_id}" — a topic only this client subscribes to, preventing
+the DoS vector of research scripts triggering gateway-broadcast updates.
+
+Results are cached in-process. Subsequent calls for the same exchange return
+instantly from cache.
+"""
+
+import asyncio
+import logging
+import struct
+import uuid
+from typing import Optional, Dict
+
+import pandas as pd
+import zmq
+import zmq.asyncio
+
+try:
+    from dexorder.generated.ingestor_pb2 import SubmitHistoricalRequest, SubmitResponse
+    from dexorder.generated.ticker24h_pb2 import Ticker24h
+except ImportError:
+    print("Warning: Protobuf files not found. Run protoc inside the sandbox container.")
+    raise
+
+log = logging.getLogger(__name__)
+
+MSG_TYPE_SUBMIT = 0x10
+MSG_TYPE_TICKER_24H = 0x0D
+PROTOCOL_VERSION = 0x01
+
+TICKER24H_COLUMNS = [
+    "ticker", "exchange_id", "base_asset", "quote_asset",
+    "last_price", "price_change_pct", "quote_volume_24h", "std_quote_volume",
+    "bid_price", "ask_price", "open_24h", "high_24h", "low_24h",
+    "volume_24h", "num_trades", "timestamp_ms",
+]
+
+
+class Ticker24hClient:
+    """
+    Client that fetches Ticker24h snapshots via the relay/Flink pipeline.
+
+    Call connect() before use. Each exchange result is cached; re-requests
+    are only issued when the cache is empty (first call per exchange per session).
+    The background listener continues running and will update the cache on any
+    future broadcast subscriptions if the subscription list is expanded.
+    """
+
+    def __init__(self, relay_endpoint: str, notification_endpoint: str):
+        self._relay_endpoint = relay_endpoint
+        self._notification_endpoint = notification_endpoint
+        self._client_id = f"t24h-{uuid.uuid4().hex[:8]}"
+        self._cache: Dict[str, Ticker24h] = {}
+        self._events: Dict[str, asyncio.Event] = {}
+        self._context: Optional[zmq.asyncio.Context] = None
+        self._sub: Optional[zmq.asyncio.Socket] = None
+        self._listener_task: Optional[asyncio.Task] = None
+        self._connected = False
+
+    async def connect(self):
+        """Start the background listener. Safe to call multiple times."""
+        if self._connected:
+            return
+
+        # Clean up stale state from a previous event loop
+        if self._listener_task is not None and not self._listener_task.done():
+            self._listener_task.cancel()
+            try:
+                await self._listener_task
+            except asyncio.CancelledError:
+                pass
+        if self._context is not None:
+            self._context.term()
+
+        self._context = zmq.asyncio.Context()
+        self._sub = self._context.socket(zmq.SUB)
+        self._sub.connect(self._notification_endpoint)
+        self._sub.subscribe(f"RESPONSE:{self._client_id}".encode())
+
+        self._listener_task = asyncio.create_task(self._listen())
+        # Let the listener establish its subscription before any request goes out
+        await asyncio.sleep(0.1)
+        self._connected = True
+        log.debug("Ticker24hClient connected: client_id=%s", self._client_id)
+
+    async def stop(self):
+        """Stop the background listener and close sockets."""
+        self._connected = False
+        if self._listener_task and not self._listener_task.done():
+            self._listener_task.cancel()
+            try:
+                await self._listener_task
+            except asyncio.CancelledError:
+                pass
+        if self._sub:
+            self._sub.close()
+            self._sub = None
+        if self._context:
+            self._context.term()
+            self._context = None
+
+    async def _listen(self):
+        while True:
+            try:
+                frames = await self._sub.recv_multipart()
+                # Wire: [topic][0x01][0x0D + Ticker24h proto bytes]
+                if len(frames) < 3:
+                    continue
+                payload = frames[2]
+                if not payload or payload[0] != MSG_TYPE_TICKER_24H:
+                    continue
+                snapshot = Ticker24h()
+                snapshot.ParseFromString(payload[1:])
+                exchange = snapshot.exchange_id
+                self._cache[exchange] = snapshot
+                event = self._events.get(exchange)
+                if event:
+                    event.set()
+                log.debug("Ticker24h received: exchange=%s tickers=%d", exchange, len(snapshot.tickers))
+            except asyncio.CancelledError:
+                return
+            except Exception as exc:
+                log.warning("Ticker24hClient listener error: %s", exc)
+
+    async def _request(self, exchange: str, timeout: float):
+        """Send a TICKER_SNAPSHOT request and wait for the notification."""
+        event = self._events.setdefault(exchange, asyncio.Event())
+        event.clear()
+
+        request_id = str(uuid.uuid4())
+        req = SubmitHistoricalRequest(
+            request_id=request_id,
+            ticker=f"@TICKER24H.{exchange}",
+            client_id=self._client_id,
+        )
+
+        version_frame = struct.pack("B", PROTOCOL_VERSION)
+        message_frame = struct.pack("B", MSG_TYPE_SUBMIT) + req.SerializeToString()
+
+        # Use a fresh REQ socket per request (matches HistoryClient pattern)
+        sock = self._context.socket(zmq.REQ)
+        sock.connect(self._relay_endpoint)
+        try:
+            await sock.send(version_frame, zmq.SNDMORE)
+            await sock.send(message_frame)
+            # Drain the relay's immediate SubmitResponse ack
+            while True:
+                await asyncio.wait_for(sock.recv(), timeout=5.0)
+                if not sock.get(zmq.RCVMORE):
+                    break
+        except asyncio.TimeoutError:
+            log.warning("No ack from relay for ticker24h request exchange=%s", exchange)
+        finally:
+            sock.close()
+
+        try:
+            await asyncio.wait_for(event.wait(), timeout=timeout)
+        except asyncio.TimeoutError:
+            raise TimeoutError(
+                f"Ticker24h request for {exchange} timed out after {timeout}s"
+            )
+
+    async def get_ticker_24h(
+        self,
+        exchange: str,
+        limit: Optional[int] = None,
+        min_std_quote_volume: Optional[float] = None,
+        market_type: Optional[str] = None,
+        base_asset_contains: Optional[str] = None,
+        request_timeout: float = 30.0,
+    ) -> pd.DataFrame:
+        """
+        Return a DataFrame of 24h stats for all symbols on the exchange.
+
+        First call per exchange triggers a relay request and waits for Flink's
+        response (up to request_timeout seconds). Subsequent calls return from cache.
+
+        Args:
+            exchange: Exchange name, e.g. "BINANCE"
+            limit: Return only top N by std_quote_volume
+            min_std_quote_volume: Exclude symbols below this USD volume threshold
+            market_type: "spot" (no ':' in ticker) or "perp" (has ':')
+            base_asset_contains: Case-insensitive substring filter on base asset
+            request_timeout: Seconds to wait for first response (default 30)
+        """
+        if self._connected and self._listener_task is not None and self._listener_task.done():
+            self._connected = False
+
+        if not self._connected:
+            await self.connect()
+
+        exchange = exchange.upper()
+        if exchange not in self._cache:
+            await self._request(exchange, timeout=request_timeout)
+
+        snapshot = self._cache[exchange]
+        rows = []
+        for ts in snapshot.tickers:
+            rows.append({
+                "ticker": ts.ticker,
+                "exchange_id": ts.exchange_id,
+                "base_asset": ts.base_asset,
+                "quote_asset": ts.quote_asset,
+                "last_price": ts.last_price,
+                "price_change_pct": ts.price_change_pct,
+                "quote_volume_24h": ts.quote_volume_24h,
+                "std_quote_volume": ts.std_quote_volume if ts.HasField("std_quote_volume") else None,
+                "bid_price": ts.bid_price if ts.HasField("bid_price") else None,
+                "ask_price": ts.ask_price if ts.HasField("ask_price") else None,
+                "open_24h": ts.open_24h if ts.HasField("open_24h") else None,
+                "high_24h": ts.high_24h if ts.HasField("high_24h") else None,
+                "low_24h": ts.low_24h if ts.HasField("low_24h") else None,
+                "volume_24h": ts.volume_24h if ts.HasField("volume_24h") else None,
+                "num_trades": ts.num_trades if ts.HasField("num_trades") else None,
+                "timestamp_ms": round(ts.timestamp / 1_000_000),
+            })
+
+        df = pd.DataFrame(rows, columns=TICKER24H_COLUMNS) if rows else pd.DataFrame(columns=TICKER24H_COLUMNS)
+
+        if market_type:
+            mt = market_type.lower()
+            if mt == "spot":
+                df = df[~df["ticker"].str.contains(":", na=False)]
+            elif mt in ("perp", "perpetual"):
+                df = df[df["ticker"].str.contains(":", na=False)]
+
+        if base_asset_contains:
+            df = df[df["base_asset"].str.contains(base_asset_contains, case=False, na=False)]
+
+        if min_std_quote_volume is not None:
+            df = df[df["std_quote_volume"].notna() & (df["std_quote_volume"] >= min_std_quote_volume)]
+
+        df = df.sort_values("std_quote_volume", ascending=False, na_position="last")
+        if limit:
+            df = df.head(limit)
+
+        return df.reset_index(drop=True)
--- a/sandbox/dexorder/tools/evaluate_indicator.py
+++ b/sandbox/dexorder/tools/evaluate_indicator.py
@@ -8,6 +8,7 @@ Returns a JSON object with a `values` array of {timestamp, ...} records, where
 timestamp is a Unix second integer and value fields hold floats (or null for NaN).
 """

+import asyncio
 import json
 import logging
 from pathlib import Path
@@ -212,9 +213,16 @@ async def evaluate_indicator(
            }))]
        args.append(df[col])

-    # Compute
+    # Compute — run in a thread so a slow indicator doesn't block the event loop
    try:
-        result = fn(*args, **parameters)
+        result = await asyncio.wait_for(
+            asyncio.to_thread(fn, *args, **parameters),
+            timeout=25.0,
+        )
+    except asyncio.TimeoutError:
+        return [TextContent(type="text", text=json.dumps({
+            "error": f"Indicator computation timed out after 25 seconds: {pandas_ta_name}"
+        }))]
    except Exception as exc:
        log.exception("evaluate_indicator: computation failed")
        return [TextContent(type="text", text=json.dumps({
--- a/sandbox/dexorder/tools/python_tools.py
+++ b/sandbox/dexorder/tools/python_tools.py
@@ -380,6 +380,12 @@ class GitManager:
 # Custom Indicator Setup
 # =============================================================================

+# Maps ta_name → git commit hash of implementation.py at last registration.
+# Used to detect when an indicator file has been updated so the binding can
+# be refreshed without requiring a process restart.
+_custom_indicator_revisions: dict[str, str] = {}
+
+
 def setup_custom_indicators(data_dir: Path) -> None:
    """
    Register user's custom indicators with pandas-ta.
@@ -388,7 +394,8 @@ def setup_custom_indicators(data_dir: Path) -> None:
    the function as ``ta.custom_{sanitized_name}`` so that evaluate_indicator
    can call it as ``getattr(ta, "custom_trendflex", None)``.

-    The binding is idempotent — indicators already registered are skipped.
+    Re-registers automatically when the implementation file's git revision
+    changes, so in-process edits are picked up without a restart.

    Note: pandas-ta's ta.import_dir() requires a category-based directory
    structure (e.g. tmpdir/momentum/trendflex.py) plus a companion
@@ -434,9 +441,29 @@ def setup_custom_indicators(data_dir: Path) -> None:
            continue
        seen.add(ta_name)

-        # Skip if already bound (e.g. called multiple times in a process)
+        # Get the current git revision of this implementation file so we can
+        # detect edits and re-register without a process restart.
+        git_rev = ""
+        try:
+            result = subprocess.run(
+                ["git", "log", "-1", "--format=%H", "--", impl.name],
+                capture_output=True, text=True, cwd=impl.parent,
+            )
+            git_rev = result.stdout.strip()
+        except Exception:
+            pass
+
        if getattr(ta, ta_name, None) is not None:
-            continue
+            if _custom_indicator_revisions.get(ta_name) == git_rev:
+                continue  # Same revision — already up to date
+            # Revision changed — clear old binding so we re-register below
+            log.info("Re-registering updated custom indicator '%s' (rev %s)", ta_name, git_rev[:8])
+            try:
+                delattr(ta, ta_name)
+            except AttributeError:
+                pass
+
+        _custom_indicator_revisions[ta_name] = git_rev

        try:
            spec = importlib.util.spec_from_file_location(ta_name, impl)
--- a/sandbox/main.py
+++ b/sandbox/main.py
@@ -1472,6 +1472,7 @@ class UserContainer:
        self.data_api: Optional[DataAPIImpl] = None
        self.event_bridge: Optional[StrategyEventBridge] = None
        self.running = False
+        self._uvicorn_server: Optional["uvicorn.Server"] = None

    async def start(self) -> None:
        """Start all subsystems"""
@@ -1642,6 +1643,7 @@ class UserContainer:
                    access_log=True,
                )
                server = uvicorn.Server(config)
+                self._uvicorn_server = server
                await server.serve()
            else:
                raise ValueError(f"Unknown MCP transport: {self.config.mcp_transport}")
@@ -1670,8 +1672,10 @@ async def main():
    loop = asyncio.get_event_loop()

    def handle_signal(sig):
-        logging.info(f"Received signal {sig}, shutting down...")
-        asyncio.create_task(container.stop())
+        logging.info(f"Received signal {sig}, initiating graceful shutdown...")
+        if container._uvicorn_server is not None:
+            container._uvicorn_server.should_exit = True
+        else:
            loop.stop()

    for sig in (signal.SIGTERM, signal.SIGINT):
--- a/web/src/components/CategoryItemList.vue
+++ b/web/src/components/CategoryItemList.vue
@@ -2,6 +2,8 @@
 import { ref } from 'vue'
 import DetailsEditDialog from './DetailsEditDialog.vue'
 import ResearchViewDialog from './ResearchViewDialog.vue'
+import { useIndicatorStore } from '../stores/indicators'
+import { useIndicatorTypesStore } from '../stores/indicatorTypes'

 const props = defineProps<{
  category: 'indicator' | 'strategy' | 'research'
@@ -14,6 +16,9 @@ const editingName = ref('')
 const viewDialogVisible = ref(false)
 const viewingName = ref('')

+const indicatorStore = useIndicatorStore()
+const indicatorTypesStore = useIndicatorTypesStore()
+
 function openEdit(name: string) {
  editingName.value = name
  dialogVisible.value = true
@@ -24,8 +29,28 @@ function openView(name: string) {
  viewDialogVisible.value = true
 }

+function addToChart(pandasTaName: string, displayName: string) {
+  const type = indicatorTypesStore.types[pandasTaName]
+  if (!type) return
+  const defaultParams: Record<string, any> = {}
+  for (const [k, p] of Object.entries(type.metadata.parameters)) {
+    defaultParams[k] = p.default
+  }
+  const now = Math.floor(Date.now() / 1000)
+  indicatorStore.addIndicator({
+    id: `${pandasTaName}_${Date.now()}`,
+    pandas_ta_name: pandasTaName,
+    instance_name: displayName,
+    parameters: defaultParams,
+    visible: true,
+    pane: type.metadata.pane,
+    custom_metadata: type.metadata,
+    created_at: now,
+    modified_at: now,
+  })
+}
+
 function onUpdated(_payload: { category: string; name: string; success: boolean; error?: string }) {
-  // Hook for handling the details_updated response — add logic here as needed
 }
 </script>

@@ -35,8 +60,9 @@ function onUpdated(_payload: { category: string; name: string; success: boolean;
    <div v-for="row in rows" :key="row.id" class="item-row">
      <span class="item-name">{{ row.display_name }}</span>
      <span class="item-desc">{{ row.description ?? '' }}</span>
-      <button v-if="category === 'research'" class="view-btn" @click="openView(row.display_name)">View</button>
-      <button class="edit-btn" @click="openEdit(row.display_name)">Edit</button>
+      <button class="edit-btn" @click="openEdit(row.display_name)">Spec</button>
+      <button v-if="category === 'research'" class="view-btn" @click="openView(row.display_name)">Result</button>
+      <button v-if="category === 'indicator'" class="use-btn" @click="addToChart(row.id, row.display_name)">Use</button>
    </div>
  </div>

@@ -138,4 +164,21 @@ function onUpdated(_payload: { category: string; name: string; success: boolean;
  border-color: #089981;
  color: #089981;
 }
+
+.use-btn {
+  flex-shrink: 0;
+  background: none;
+  border: 1px solid #3d3d3d;
+  color: #888;
+  cursor: pointer;
+  font-size: 11px;
+  padding: 2px 8px;
+  border-radius: 3px;
+  line-height: 18px;
+}
+
+.use-btn:hover {
+  border-color: #4a9eca;
+  color: #4a9eca;
+}
 </style>
--- a/web/src/components/DetailsEditDialog.vue
+++ b/web/src/components/DetailsEditDialog.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, watch, computed, onUnmounted } from 'vue'
+import { ref, watch, computed, onUnmounted, nextTick } from 'vue'
 import Dialog from 'primevue/dialog'
 import Button from 'primevue/button'
 import { useEditor, EditorContent } from '@tiptap/vue-3'
@@ -54,12 +54,13 @@ watch(() => props.visible, (v) => {
  }
 })

-const messageHandler = (msg: WebSocketMessage) => {
+const messageHandler = async (msg: WebSocketMessage) => {
  if (msg.category !== props.category || msg.name !== props.name) return

  if (msg.type === 'details_data') {
-    originalContent.value = msg.details ?? ''
    editor.value?.commands.setContent(msg.details ?? '')
+    await nextTick()
+    originalContent.value = (editor.value?.storage as any).markdown.getMarkdown() ?? ''
    loadState.value = 'ready'
  } else if (msg.type === 'details_error') {
    loadError.value = msg.error ?? 'Failed to load details'
--- a/web/src/composables/useCustomIndicators.ts
+++ b/web/src/composables/useCustomIndicators.ts
@@ -79,21 +79,37 @@ function evaluateIndicator(
  periodSeconds: number,
  pandasTaName: string,
  parameters: Record<string, any>,
-  timeoutMs = 30_000
+  timeoutMs = 30_000,
+  signal?: AbortSignal,
 ): Promise<EvaluateResult> {
  const requestId = `cind_${Date.now()}_${Math.random().toString(36).substring(7)}`

  return new Promise((resolve, reject) => {
-    const timer = window.setTimeout(() => {
+    if (signal?.aborted) {
+      reject(new DOMException('Evaluation superseded', 'AbortError'))
+      return
+    }
+
+    const cleanup = () => {
+      clearTimeout(timer)
      wsManager.removeHandler(handler)
+      signal?.removeEventListener('abort', onAbort)
+    }
+    const onAbort = () => {
+      cleanup()
+      reject(new DOMException('Evaluation superseded', 'AbortError'))
+    }
+    signal?.addEventListener('abort', onAbort, { once: true })
+
+    const timer = window.setTimeout(() => {
+      cleanup()
      reject(new Error(`evaluate_indicator timeout for ${pandasTaName}`))
    }, timeoutMs)

    const handler: MessageHandler = (message: any) => {
      if (message.type !== 'evaluate_indicator_result') return
      if (message.request_id !== requestId) return
-      clearTimeout(timer)
-      wsManager.removeHandler(handler)
+      cleanup()
      if (message.error) reject(new Error(message.error))
      else resolve(message as EvaluateResult)
    }
@@ -155,6 +171,10 @@ const refreshCallbacks = new Map<string, (newCfgKey: string) => void>()
 // Used to detect when the visible range has expanded beyond the fetched range.
 const fetchedRanges = new Map<string, { fromTime: number; toTime: number }>()

+// indicatorId → AbortController for the in-flight evaluate_indicator request.
+// Aborted when a newer request supersedes it (e.g. rapid scrolling).
+const pendingEvaluations = new Map<string, AbortController>()
+
 // TradingView widget reference — set by useCustomIndicators() so the
 // constructor can query the current visible range.
 let _tvWidget: any = null
@@ -230,8 +250,16 @@ function makeStudyConstructor(nOutputs: number = MAX_PLOTS) {
      // Record the fetched range so range-expansion watchers can detect gaps
      fetchedRanges.set(entry.indicatorId, { fromTime, toTime })

-      evaluateIndicator(symbol, fromTime, toTime, periodSeconds, entry.pandasTaName, entry.parameters)
+      // Cancel any in-flight evaluation for this indicator before starting a new one
+      const prevAbort = pendingEvaluations.get(entry.indicatorId)
+      if (prevAbort) prevAbort.abort()
+      const abortController = new AbortController()
+      pendingEvaluations.set(entry.indicatorId, abortController)
+
+      evaluateIndicator(symbol, fromTime, toTime, periodSeconds, entry.pandasTaName,
+        entry.parameters, 30_000, abortController.signal)
        .then((result) => {
+          pendingEvaluations.delete(entry.indicatorId)
          if (myGen !== _fetchGen) return
          dataCache.set(capturedDk, buildDataCache(result))
          const refreshKey = `${capturedCfgKey}__r`
@@ -240,7 +268,9 @@ function makeStudyConstructor(nOutputs: number = MAX_PLOTS) {
          if (cb) cb(refreshKey)
        })
        .catch((err) => {
+          if (err instanceof DOMException && err.name === 'AbortError') return
          console.error('[CustomIndicators] Failed to fetch data for', entry.pandasTaName, err)
+          pendingEvaluations.delete(entry.indicatorId)
          fetchedRanges.delete(entry.indicatorId)
        })
    }
@@ -664,6 +694,12 @@ export function useCustomIndicators(tvWidget: any) {
    refreshCallbacks.delete(indicatorId)
    fetchedRanges.delete(indicatorId)

+    const abort = pendingEvaluations.get(indicatorId)
+    if (abort) {
+      abort.abort()
+      pendingEvaluations.delete(indicatorId)
+    }
+
    pendingRegistration.delete(indicatorId)
    if (entry.tvStudyId) {
      try { tvWidget.activeChart().removeStudy(entry.tvStudyId) } catch { /* already gone */ }
--- a/web/src/composables/useTradingViewDatafeed.ts
+++ b/web/src/composables/useTradingViewDatafeed.ts
@@ -119,6 +119,12 @@ export class WebSocketDatafeed implements IBasicDataFeed {
      const subscription = this.subscriptions.get(message.subscription_id)
      if (subscription && message.bar) {
        const symbolKey = subscription.symbolInfo.ticker || subscription.symbolInfo.name
+
+        // Drop bars whose ticker doesn't match the current subscription's symbol.
+        // This prevents a bar in-flight from a previous chart symbol reaching the new chart
+        // when the user switches symbols faster than the network round-trip.
+        if (message.ticker && message.ticker !== symbolKey) return
+
        const denoms = this.symbolDenominators.get(symbolKey) || { tick: 1, base: 1 }

        // Drop bars already covered by getBars history to prevent time-order violations
@@ -334,7 +340,8 @@ export class WebSocketDatafeed implements IBasicDataFeed {
      type: 'subscribe_bars',
      symbol: symbolInfo.ticker || symbolInfo.name,
      period_seconds: intervalToSeconds(resolution),
-      subscription_id: listenerGuid
+      subscription_id: listenerGuid,
+      bar_type: 'open',  // chart always wants live in-progress bar updates
    })
      .then((response) => {
        if (response.success) {
@@ -353,13 +360,20 @@ export class WebSocketDatafeed implements IBasicDataFeed {

  unsubscribeBars(listenerGuid: string): void {
    const sub = this.subscriptions.get(listenerGuid)
+
+    // Remove immediately so any in-flight bar_update for this guid is ignored
+    // before the async server response arrives.
+    this.subscriptions.delete(listenerGuid)
+    if (sub) {
+      const barKey = `${sub.symbolInfo.ticker || sub.symbolInfo.name}_${intervalToSeconds(sub.resolution)}`
+      this.lastBarTimes.delete(barKey)
+    }
+
    this.sendRequest<any>({
      type: 'unsubscribe_bars',
+      symbol: sub?.symbolInfo.ticker || sub?.symbolInfo.name,
      period_seconds: sub ? intervalToSeconds(sub.resolution) : 60,
      subscription_id: listenerGuid
-    })
-      .then(() => {
-        this.subscriptions.delete(listenerGuid)
    })
      .catch((error) => {
        console.error('Failed to unsubscribe from bars:', error)