bugfixes

web/src/composables/useTradingViewDatafeed.ts

@@ -45,6 +45,9 @@ export class WebSocketDatafeed implements IBasicDataFeed {
   private configuration: DatafeedConfiguration | null = null
   private messageHandler: MessageHandler
   private symbolDenominators: Map<string, SymbolDenominators> = new Map() // Track denominators per symbol
+  // Tracks the last bar time (ms) returned by getBars per "symbolKey_periodSeconds".
+  // bar_updates with time < this watermark are stale and already covered by history.
+  private lastBarTimes: Map<string, number> = new Map()
 
   constructor() {
     // Use the shared WebSocket connection (managed by App.vue authentication)
@@ -118,6 +121,14 @@ export class WebSocketDatafeed implements IBasicDataFeed {
         const symbolKey = subscription.symbolInfo.ticker || subscription.symbolInfo.name
         const denoms = this.symbolDenominators.get(symbolKey) || { tick: 1, base: 1 }
 
+        // Drop bars already covered by getBars history to prevent time-order violations
+        const barTimeMs = message.bar.time * 1000
+        const barKey = `${symbolKey}_${message.period_seconds}`
+        const watermark = this.lastBarTimes.get(barKey) ?? 0
+        if (barTimeMs < watermark) {
+          return
+        }
+
         const bar: Bar = {
           time: message.bar.time * 1000, // Convert to milliseconds
           open: parseFloat(message.bar.open) / denoms.tick,
@@ -284,6 +295,16 @@ export class WebSocketDatafeed implements IBasicDataFeed {
 
           bars.sort((a, b) => a.time - b.time)
 
+          // Update last-bar watermark so bar_update handler can drop stale replays
+          if (bars.length > 0) {
+            const barKey = `${symbolKey}_${intervalToSeconds(resolution)}`
+            const newLast = bars[bars.length - 1].time
+            const prevLast = this.lastBarTimes.get(barKey) ?? 0
+            if (newLast > prevLast) {
+              this.lastBarTimes.set(barKey, newLast)
+            }
+          }
+
           console.log('[TradingView Datafeed] Scaled bar sample:', bars[0])
 
           const meta: HistoryMetadata = {