VERSION 1.12 @ 2018-02-14 07:05:47.033501

Cannot read property 'contains' of null #2442 Terminal: custom sorting for account manager tables #2344 Datafeed not closed after removing chart #2270 order.setPrice() has stopped working #2267 Volume in DOM rounded to 0 #2255 Error on bars request and update order lines #2237 Console error: Uncaught (in promise) formatter not received #2228 DOME doesn't work in new version #2211 Add featureset to hide toolbars by default #2209 Add possibility to move studies through z-order #2187 Unexpected resolution values in getBars #2179 Session breaks line is stuck to the left on reload #2153 Typescript declaration has mistakes #2144 Terminal: cannot specify step less than 1 #2141 Namespace the types in charting_library.d.ts #2137 Widget logo showing momentarily on paid account #2132 Add API to apply overrides for created studies #2098 Baseline chart style #2097 How to hide legend "Data Provided by ICE Data services" #2046 Stoch RSI Calculation #2038 Customize loading screen #2012 Supertrend indicator #1950 Translations in market details widget #1946 "Track time" chart setting #1918 Add tabs for positions #1906 Trading Terminal: Notifications Log #1896 Previous Close Price Line #1843 Set Overlay/Compare styles using createStudy/overrides and applyStudiesOverrides #1812 Session under Symbol info is displaying wrong trading interval(s)? #1787 Add "Go to" specific date #1753 Add session breaks #1752 Allow users to specify a volume for the Long/Short Position drawing tools #1691 Add API to use own charts save/load adapter #1679 Drawing toolbar not available in mobile #1673 Typescript definitions #1591 Support for symbols containing lowercase letters #1581 createMultipointShape long_position stop&profit setting #1459 Cannot change awesome oscillator width #1213 New adaptive drawings panel #1145 Edit shapes, studies and series #1101 Hide an indicator with API #1025 VWAP INDICATOR #106
2018-02-14 01:10:34 -06:00
parent 7feb3edc93
commit d15c5cfb60
98 changed files with 4647 additions and 2034 deletions
--- a/datafeeds/README.md
+++ b/datafeeds/README.md
@@ -0,0 +1,3 @@
+# Charting Library Datafeeds
+
+This folder contains implementation of Charting Library Datafeeds.
--- a/datafeeds/udf/.npmrc
+++ b/datafeeds/udf/.npmrc
@@ -0,0 +1 @@
+package-lock=false
--- a/datafeeds/udf/README.md
+++ b/datafeeds/udf/README.md
@@ -0,0 +1,44 @@
+# UDF Compatible Datafeed
+
+This folder contains [UDF](https://github.com/tradingview/charting_library/wiki/UDF) datafeed adapter. It implements [JS API](https://github.com/tradingview/charting_library/wiki/JS%20API) and makes HTTP requests using [UDF](https://github.com/tradingview/charting_library/wiki/UDF) protocol.
+
+You can use this datafeed adapter to plug your data if you implement [UDF](https://github.com/tradingview/charting_library/wiki/UDF) on your server. You can also scrutinize how it works before writing your own adapter.
+
+This datafeed is implemented in [TypeScript](https://github.com/Microsoft/TypeScript/).
+
+## Folders content
+
+- `./src` folder contains the source code in TypeScript.
+
+- `./lib` folder contains transpiled in es5 code. So, if you do not know how to use TypeScript - you can modify these files to change the result bundle later.
+
+- `./dist` folder contains bundled JavaScript files which can be inlined into a page and used in the Widget Constructor.
+
+## Build & bundle
+
+Before building or bundling your code you need to run `npm install` to install dependencies.
+
+`package.json` contains some handy scripts to build or generate the bundle:
+- `npm run compile` to compile TypeScript source code into JavaScript files (output will be in `./lib` folder)
+- `npm run bundle-js` to bundle multiple JavaScript files into one bundle (it also bundle polyfills)
+- `npm run build` to compile and bundle (it is a combination of all above commands)
+
+NOTE: if you want to minify the bundle code, you need to set `ENV` environment variable to a value different from `development`.
+
+For example:
+```bash
+export ENV=prod
+npm run bundle-js # or npm run build
+```
+
+or
+
+```bash
+ENV=prod npm run bundle-js
+```
+
+or
+
+```bash
+ENV=prod npm run build
+```
--- a/datafeeds/udf/dist/bundle.js
+++ b/datafeeds/udf/dist/bundle.js
--- a/datafeeds/udf/dist/polyfills.js
+++ b/datafeeds/udf/dist/polyfills.js
--- a/datafeeds/udf/lib/data-pulse-provider.js
+++ b/datafeeds/udf/lib/data-pulse-provider.js
@@ -0,0 +1,107 @@
+import { getErrorMessage, logMessage, } from './helpers';
+var DataPulseProvider = /** @class */ (function () {
+    function DataPulseProvider(historyProvider, updateFrequency) {
+        this._subscribers = {};
+        this._requestsPending = 0;
+        this._historyProvider = historyProvider;
+        setInterval(this._updateData.bind(this), updateFrequency);
+    }
+    DataPulseProvider.prototype.subscribeBars = function (symbolInfo, resolution, newDataCallback, listenerGuid) {
+        if (this._subscribers.hasOwnProperty(listenerGuid)) {
+            logMessage("DataPulseProvider: already has subscriber with id=" + listenerGuid);
+            return;
+        }
+        this._subscribers[listenerGuid] = {
+            lastBarTime: null,
+            listener: newDataCallback,
+            resolution: resolution,
+            symbolInfo: symbolInfo,
+        };
+        logMessage("DataPulseProvider: subscribed for #" + listenerGuid + " - {" + symbolInfo.name + ", " + resolution + "}");
+    };
+    DataPulseProvider.prototype.unsubscribeBars = function (listenerGuid) {
+        delete this._subscribers[listenerGuid];
+        logMessage("DataPulseProvider: unsubscribed for #" + listenerGuid);
+    };
+    DataPulseProvider.prototype._updateData = function () {
+        var _this = this;
+        if (this._requestsPending > 0) {
+            return;
+        }
+        this._requestsPending = 0;
+        var _loop_1 = function (listenerGuid) {
+            this_1._requestsPending += 1;
+            this_1._updateDataForSubscriber(listenerGuid)
+                .then(function () {
+                _this._requestsPending -= 1;
+                logMessage("DataPulseProvider: data for #" + listenerGuid + " updated successfully, pending=" + _this._requestsPending);
+            })
+                .catch(function (reason) {
+                _this._requestsPending -= 1;
+                logMessage("DataPulseProvider: data for #" + listenerGuid + " updated with error=" + getErrorMessage(reason) + ", pending=" + _this._requestsPending);
+            });
+        };
+        var this_1 = this;
+        for (var listenerGuid in this._subscribers) {
+            _loop_1(listenerGuid);
+        }
+    };
+    DataPulseProvider.prototype._updateDataForSubscriber = function (listenerGuid) {
+        var _this = this;
+        var subscriptionRecord = this._subscribers[listenerGuid];
+        var rangeEndTime = parseInt((Date.now() / 1000).toString());
+        // BEWARE: please note we really need 2 bars, not the only last one
+        // see the explanation below. `10` is the `large enough` value to work around holidays
+        var rangeStartTime = rangeEndTime - periodLengthSeconds(subscriptionRecord.resolution, 10);
+        return this._historyProvider.getBars(subscriptionRecord.symbolInfo, subscriptionRecord.resolution, rangeStartTime, rangeEndTime)
+            .then(function (result) {
+            _this._onSubscriberDataReceived(listenerGuid, result);
+        });
+    };
+    DataPulseProvider.prototype._onSubscriberDataReceived = function (listenerGuid, result) {
+        // means the subscription was cancelled while waiting for data
+        if (!this._subscribers.hasOwnProperty(listenerGuid)) {
+            logMessage("DataPulseProvider: Data comes for already unsubscribed subscription #" + listenerGuid);
+            return;
+        }
+        var bars = result.bars;
+        if (bars.length === 0) {
+            return;
+        }
+        var lastBar = bars[bars.length - 1];
+        var subscriptionRecord = this._subscribers[listenerGuid];
+        if (subscriptionRecord.lastBarTime !== null && lastBar.time < subscriptionRecord.lastBarTime) {
+            return;
+        }
+        var isNewBar = subscriptionRecord.lastBarTime !== null && lastBar.time > subscriptionRecord.lastBarTime;
+        // Pulse updating may miss some trades data (ie, if pulse period = 10 secods and new bar is started 5 seconds later after the last update, the
+        // old bar's last 5 seconds trades will be lost). Thus, at fist we should broadcast old bar updates when it's ready.
+        if (isNewBar) {
+            if (bars.length < 2) {
+                throw new Error('Not enough bars in history for proper pulse update. Need at least 2.');
+            }
+            var previousBar = bars[bars.length - 2];
+            subscriptionRecord.listener(previousBar);
+        }
+        subscriptionRecord.lastBarTime = lastBar.time;
+        subscriptionRecord.listener(lastBar);
+    };
+    return DataPulseProvider;
+}());
+export { DataPulseProvider };
+function periodLengthSeconds(resolution, requiredPeriodsCount) {
+    var daysCount = 0;
+    if (resolution === 'D') {
+        daysCount = requiredPeriodsCount;
+    }
+    else if (resolution === 'M') {
+        daysCount = 31 * requiredPeriodsCount;
+    }
+    else if (resolution === 'W') {
+        daysCount = 7 * requiredPeriodsCount;
+    }
+    else {
+        daysCount = requiredPeriodsCount * parseInt(resolution) / (24 * 60);
+    }
+    return daysCount * 24 * 60 * 60;
+}
--- a/datafeeds/udf/lib/helpers.js
+++ b/datafeeds/udf/lib/helpers.js
@@ -0,0 +1,19 @@
+/**
+ * If you want to enable logs from datafeed set it to `true`
+ */
+var isLoggingEnabled = false;
+export function logMessage(message) {
+    if (isLoggingEnabled) {
+        var now = new Date();
+        console.log(now.toLocaleTimeString() + "." + now.getMilliseconds() + "> " + message);
+    }
+}
+export function getErrorMessage(error) {
+    if (error === undefined) {
+        return '';
+    }
+    else if (typeof error === 'string') {
+        return error;
+    }
+    return error.message;
+}
--- a/datafeeds/udf/lib/history-provider.js
+++ b/datafeeds/udf/lib/history-provider.js
@@ -0,0 +1,66 @@
+import { getErrorMessage, } from './helpers';
+var HistoryProvider = /** @class */ (function () {
+    function HistoryProvider(datafeedUrl, requester) {
+        this._datafeedUrl = datafeedUrl;
+        this._requester = requester;
+    }
+    HistoryProvider.prototype.getBars = function (symbolInfo, resolution, rangeStartDate, rangeEndDate) {
+        var _this = this;
+        var requestParams = {
+            symbol: symbolInfo.ticker || '',
+            resolution: resolution,
+            from: rangeStartDate,
+            to: rangeEndDate,
+        };
+        return new Promise(function (resolve, reject) {
+            _this._requester.sendRequest(_this._datafeedUrl, 'history', requestParams)
+                .then(function (response) {
+                if (response.s !== 'ok' && response.s !== 'no_data') {
+                    reject(response.errmsg);
+                    return;
+                }
+                var bars = [];
+                var meta = {
+                    noData: false,
+                };
+                if (response.s === 'no_data') {
+                    meta.noData = true;
+                    meta.nextTime = response.nextTime;
+                }
+                else {
+                    var volumePresent = response.v !== undefined;
+                    var ohlPresent = response.o !== undefined;
+                    for (var i = 0; i < response.t.length; ++i) {
+                        var barValue = {
+                            time: response.t[i] * 1000,
+                            close: Number(response.c[i]),
+                            open: Number(response.c[i]),
+                            high: Number(response.c[i]),
+                            low: Number(response.c[i]),
+                        };
+                        if (ohlPresent) {
+                            barValue.open = Number(response.o[i]);
+                            barValue.high = Number(response.h[i]);
+                            barValue.low = Number(response.l[i]);
+                        }
+                        if (volumePresent) {
+                            barValue.volume = Number(response.v[i]);
+                        }
+                        bars.push(barValue);
+                    }
+                }
+                resolve({
+                    bars: bars,
+                    meta: meta,
+                });
+            })
+                .catch(function (reason) {
+                var reasonString = getErrorMessage(reason);
+                console.warn("HistoryProvider: getBars() failed, error=" + reasonString);
+                reject(reasonString);
+            });
+        });
+    };
+    return HistoryProvider;
+}());
+export { HistoryProvider };
--- a/datafeeds/udf/lib/iquotes-provider.js
+++ b/datafeeds/udf/lib/iquotes-provider.js
--- a/datafeeds/udf/lib/quotes-provider.js
+++ b/datafeeds/udf/lib/quotes-provider.js
@@ -0,0 +1,28 @@
+import { getErrorMessage, logMessage, } from './helpers';
+var QuotesProvider = /** @class */ (function () {
+    function QuotesProvider(datafeedUrl, requester) {
+        this._datafeedUrl = datafeedUrl;
+        this._requester = requester;
+    }
+    QuotesProvider.prototype.getQuotes = function (symbols) {
+        var _this = this;
+        return new Promise(function (resolve, reject) {
+            _this._requester.sendRequest(_this._datafeedUrl, 'quotes', { symbols: symbols })
+                .then(function (response) {
+                if (response.s === 'ok') {
+                    resolve(response.d);
+                }
+                else {
+                    reject(response.errmsg);
+                }
+            })
+                .catch(function (error) {
+                var errorMessage = getErrorMessage(error);
+                logMessage("QuotesProvider: getQuotes failed, error=" + errorMessage);
+                reject("network error: " + errorMessage);
+            });
+        });
+    };
+    return QuotesProvider;
+}());
+export { QuotesProvider };
--- a/datafeeds/udf/lib/quotes-pulse-provider.js
+++ b/datafeeds/udf/lib/quotes-pulse-provider.js
@@ -0,0 +1,51 @@
+import { getErrorMessage, logMessage, } from './helpers';
+var QuotesPulseProvider = /** @class */ (function () {
+    function QuotesPulseProvider(quotesProvider) {
+        this._subscribers = {};
+        this._requestsPending = 0;
+        this._quotesProvider = quotesProvider;
+        setInterval(this._updateQuotes.bind(this, 1 /* Fast */), 10000 /* Fast */);
+        setInterval(this._updateQuotes.bind(this, 0 /* General */), 60000 /* General */);
+    }
+    QuotesPulseProvider.prototype.subscribeQuotes = function (symbols, fastSymbols, onRealtimeCallback, listenerGuid) {
+        this._subscribers[listenerGuid] = {
+            symbols: symbols,
+            fastSymbols: fastSymbols,
+            listener: onRealtimeCallback,
+        };
+        logMessage("QuotesPulseProvider: subscribed quotes with #" + listenerGuid);
+    };
+    QuotesPulseProvider.prototype.unsubscribeQuotes = function (listenerGuid) {
+        delete this._subscribers[listenerGuid];
+        logMessage("QuotesPulseProvider: unsubscribed quotes with #" + listenerGuid);
+    };
+    QuotesPulseProvider.prototype._updateQuotes = function (updateType) {
+        var _this = this;
+        if (this._requestsPending > 0) {
+            return;
+        }
+        var _loop_1 = function (listenerGuid) {
+            this_1._requestsPending++;
+            var subscriptionRecord = this_1._subscribers[listenerGuid];
+            this_1._quotesProvider.getQuotes(updateType === 1 /* Fast */ ? subscriptionRecord.fastSymbols : subscriptionRecord.symbols)
+                .then(function (data) {
+                _this._requestsPending--;
+                if (!_this._subscribers.hasOwnProperty(listenerGuid)) {
+                    return;
+                }
+                subscriptionRecord.listener(data);
+                logMessage("QuotesPulseProvider: data for #" + listenerGuid + " (" + updateType + ") updated successfully, pending=" + _this._requestsPending);
+            })
+                .catch(function (reason) {
+                _this._requestsPending--;
+                logMessage("QuotesPulseProvider: data for #" + listenerGuid + " (" + updateType + ") updated with error=" + getErrorMessage(reason) + ", pending=" + _this._requestsPending);
+            });
+        };
+        var this_1 = this;
+        for (var listenerGuid in this._subscribers) {
+            _loop_1(listenerGuid);
+        }
+    };
+    return QuotesPulseProvider;
+}());
+export { QuotesPulseProvider };
--- a/datafeeds/udf/lib/requester.js
+++ b/datafeeds/udf/lib/requester.js
@@ -0,0 +1,29 @@
+import { logMessage } from './helpers';
+var Requester = /** @class */ (function () {
+    function Requester(headers) {
+        if (headers) {
+            this._headers = headers;
+        }
+    }
+    Requester.prototype.sendRequest = function (datafeedUrl, urlPath, params) {
+        if (params !== undefined) {
+            var paramKeys = Object.keys(params);
+            if (paramKeys.length !== 0) {
+                urlPath += '?';
+            }
+            urlPath += paramKeys.map(function (key) {
+                return encodeURIComponent(key) + "=" + encodeURIComponent(params[key].toString());
+            }).join('&');
+        }
+        logMessage('New request: ' + urlPath);
+        var options = {};
+        if (this._headers !== undefined) {
+            options.headers = this._headers;
+        }
+        return fetch(datafeedUrl + "/" + urlPath, options)
+            .then(function (response) { return response.text(); })
+            .then(function (responseTest) { return JSON.parse(responseTest); });
+    };
+    return Requester;
+}());
+export { Requester };
--- a/datafeeds/udf/lib/symbols-storage.js
+++ b/datafeeds/udf/lib/symbols-storage.js
@@ -0,0 +1,169 @@
+import { getErrorMessage, logMessage, } from './helpers';
+function extractField(data, field, arrayIndex) {
+    var value = data[field];
+    return Array.isArray(value) ? value[arrayIndex] : value;
+}
+var SymbolsStorage = /** @class */ (function () {
+    function SymbolsStorage(datafeedUrl, datafeedSupportedResolutions, requester) {
+        this._exchangesList = ['NYSE', 'FOREX', 'AMEX'];
+        this._symbolsInfo = {};
+        this._symbolsList = [];
+        this._datafeedUrl = datafeedUrl;
+        this._datafeedSupportedResolutions = datafeedSupportedResolutions;
+        this._requester = requester;
+        this._readyPromise = this._init();
+        this._readyPromise.catch(function (error) {
+            // seems it is impossible
+            console.error("SymbolsStorage: Cannot init, error=" + error.toString());
+        });
+    }
+    // BEWARE: this function does not consider symbol's exchange
+    SymbolsStorage.prototype.resolveSymbol = function (symbolName) {
+        var _this = this;
+        return this._readyPromise.then(function () {
+            var symbolInfo = _this._symbolsInfo[symbolName];
+            if (symbolInfo === undefined) {
+                return Promise.reject('invalid symbol');
+            }
+            return Promise.resolve(symbolInfo);
+        });
+    };
+    SymbolsStorage.prototype.searchSymbols = function (searchString, exchange, symbolType, maxSearchResults) {
+        var _this = this;
+        return this._readyPromise.then(function () {
+            var weightedResult = [];
+            var queryIsEmpty = searchString.length === 0;
+            searchString = searchString.toUpperCase();
+            var _loop_1 = function (symbolName) {
+                var symbolInfo = _this._symbolsInfo[symbolName];
+                if (symbolInfo === undefined) {
+                    return "continue";
+                }
+                if (symbolType.length > 0 && symbolInfo.type !== symbolType) {
+                    return "continue";
+                }
+                if (exchange && exchange.length > 0 && symbolInfo.exchange !== exchange) {
+                    return "continue";
+                }
+                var positionInName = symbolInfo.name.toUpperCase().indexOf(searchString);
+                var positionInDescription = symbolInfo.description.toUpperCase().indexOf(searchString);
+                if (queryIsEmpty || positionInName >= 0 || positionInDescription >= 0) {
+                    var alreadyExists = weightedResult.some(function (item) { return item.symbolInfo === symbolInfo; });
+                    if (!alreadyExists) {
+                        var weight = positionInName >= 0 ? positionInName : 8000 + positionInDescription;
+                        weightedResult.push({ symbolInfo: symbolInfo, weight: weight });
+                    }
+                }
+            };
+            for (var _i = 0, _a = _this._symbolsList; _i < _a.length; _i++) {
+                var symbolName = _a[_i];
+                _loop_1(symbolName);
+            }
+            var result = weightedResult
+                .sort(function (item1, item2) { return item1.weight - item2.weight; })
+                .slice(0, maxSearchResults)
+                .map(function (item) {
+                var symbolInfo = item.symbolInfo;
+                return {
+                    symbol: symbolInfo.name,
+                    full_name: symbolInfo.full_name,
+                    description: symbolInfo.description,
+                    exchange: symbolInfo.exchange,
+                    params: [],
+                    type: symbolInfo.type,
+                    ticker: symbolInfo.name,
+                };
+            });
+            return Promise.resolve(result);
+        });
+    };
+    SymbolsStorage.prototype._init = function () {
+        var _this = this;
+        var promises = [];
+        var alreadyRequestedExchanges = {};
+        for (var _i = 0, _a = this._exchangesList; _i < _a.length; _i++) {
+            var exchange = _a[_i];
+            if (alreadyRequestedExchanges[exchange]) {
+                continue;
+            }
+            alreadyRequestedExchanges[exchange] = true;
+            promises.push(this._requestExchangeData(exchange));
+        }
+        return Promise.all(promises)
+            .then(function () {
+            _this._symbolsList.sort();
+            logMessage('SymbolsStorage: All exchanges data loaded');
+        });
+    };
+    SymbolsStorage.prototype._requestExchangeData = function (exchange) {
+        var _this = this;
+        return new Promise(function (resolve, reject) {
+            _this._requester.sendRequest(_this._datafeedUrl, 'symbol_info', { group: exchange })
+                .then(function (response) {
+                try {
+                    _this._onExchangeDataReceived(exchange, response);
+                }
+                catch (error) {
+                    reject(error);
+                    return;
+                }
+                resolve();
+            })
+                .catch(function (reason) {
+                logMessage("SymbolsStorage: Request data for exchange '" + exchange + "' failed, reason=" + getErrorMessage(reason));
+                resolve();
+            });
+        });
+    };
+    SymbolsStorage.prototype._onExchangeDataReceived = function (exchange, data) {
+        var symbolIndex = 0;
+        try {
+            var symbolsCount = data.symbol.length;
+            var tickerPresent = data.ticker !== undefined;
+            for (; symbolIndex < symbolsCount; ++symbolIndex) {
+                var symbolName = data.symbol[symbolIndex];
+                var listedExchange = extractField(data, 'exchange-listed', symbolIndex);
+                var tradedExchange = extractField(data, 'exchange-traded', symbolIndex);
+                var fullName = tradedExchange + ':' + symbolName;
+                var ticker = tickerPresent ? extractField(data, 'ticker', symbolIndex) : symbolName;
+                var symbolInfo = {
+                    ticker: ticker,
+                    name: symbolName,
+                    base_name: [listedExchange + ':' + symbolName],
+                    full_name: fullName,
+                    listed_exchange: listedExchange,
+                    exchange: tradedExchange,
+                    description: extractField(data, 'description', symbolIndex),
+                    has_intraday: definedValueOrDefault(extractField(data, 'has-intraday', symbolIndex), false),
+                    has_no_volume: definedValueOrDefault(extractField(data, 'has-no-volume', symbolIndex), false),
+                    minmov: extractField(data, 'minmovement', symbolIndex) || extractField(data, 'minmov', symbolIndex) || 0,
+                    minmove2: extractField(data, 'minmove2', symbolIndex) || extractField(data, 'minmov2', symbolIndex),
+                    fractional: extractField(data, 'fractional', symbolIndex),
+                    pricescale: extractField(data, 'pricescale', symbolIndex),
+                    type: extractField(data, 'type', symbolIndex),
+                    session: extractField(data, 'session-regular', symbolIndex),
+                    timezone: extractField(data, 'timezone', symbolIndex),
+                    supported_resolutions: definedValueOrDefault(extractField(data, 'supported-resolutions', symbolIndex), this._datafeedSupportedResolutions),
+                    force_session_rebuild: extractField(data, 'force-session-rebuild', symbolIndex),
+                    has_daily: definedValueOrDefault(extractField(data, 'has-daily', symbolIndex), true),
+                    intraday_multipliers: definedValueOrDefault(extractField(data, 'intraday-multipliers', symbolIndex), ['1', '5', '15', '30', '60']),
+                    has_weekly_and_monthly: extractField(data, 'has-weekly-and-monthly', symbolIndex),
+                    has_empty_bars: extractField(data, 'has-empty-bars', symbolIndex),
+                    volume_precision: definedValueOrDefault(extractField(data, 'volume-precision', symbolIndex), 0),
+                };
+                this._symbolsInfo[ticker] = symbolInfo;
+                this._symbolsInfo[symbolName] = symbolInfo;
+                this._symbolsInfo[fullName] = symbolInfo;
+                this._symbolsList.push(symbolName);
+            }
+        }
+        catch (error) {
+            throw new Error("SymbolsStorage: API error when processing exchange " + exchange + " symbol #" + symbolIndex + " (" + data.symbol[symbolIndex] + "): " + error.message);
+        }
+    };
+    return SymbolsStorage;
+}());
+export { SymbolsStorage };
+function definedValueOrDefault(value, defaultValue) {
+    return value !== undefined ? value : defaultValue;
+}
--- a/datafeeds/udf/lib/udf-compatible-datafeed-base.js
+++ b/datafeeds/udf/lib/udf-compatible-datafeed-base.js
@@ -0,0 +1,243 @@
+import { getErrorMessage, logMessage, } from './helpers';
+import { HistoryProvider, } from './history-provider';
+import { DataPulseProvider } from './data-pulse-provider';
+import { QuotesPulseProvider } from './quotes-pulse-provider';
+import { SymbolsStorage } from './symbols-storage';
+function extractField(data, field, arrayIndex) {
+    var value = data[field];
+    return Array.isArray(value) ? value[arrayIndex] : value;
+}
+/**
+ * This class implements interaction with UDF-compatible datafeed.
+ * See UDF protocol reference at https://github.com/tradingview/charting_library/wiki/UDF
+ */
+var UDFCompatibleDatafeedBase = /** @class */ (function () {
+    function UDFCompatibleDatafeedBase(datafeedURL, quotesProvider, requester, updateFrequency) {
+        if (updateFrequency === void 0) { updateFrequency = 10 * 1000; }
+        var _this = this;
+        this._configuration = defaultConfiguration();
+        this._symbolsStorage = null;
+        this._datafeedURL = datafeedURL;
+        this._requester = requester;
+        this._historyProvider = new HistoryProvider(datafeedURL, this._requester);
+        this._quotesProvider = quotesProvider;
+        this._dataPulseProvider = new DataPulseProvider(this._historyProvider, updateFrequency);
+        this._quotesPulseProvider = new QuotesPulseProvider(this._quotesProvider);
+        this._configurationReadyPromise = this._requestConfiguration()
+            .then(function (configuration) {
+            if (configuration === null) {
+                configuration = defaultConfiguration();
+            }
+            _this._setupWithConfiguration(configuration);
+        });
+    }
+    UDFCompatibleDatafeedBase.prototype.onReady = function (callback) {
+        var _this = this;
+        this._configurationReadyPromise.then(function () {
+            callback(_this._configuration);
+        });
+    };
+    UDFCompatibleDatafeedBase.prototype.getQuotes = function (symbols, onDataCallback, onErrorCallback) {
+        this._quotesProvider.getQuotes(symbols).then(onDataCallback).catch(onErrorCallback);
+    };
+    UDFCompatibleDatafeedBase.prototype.subscribeQuotes = function (symbols, fastSymbols, onRealtimeCallback, listenerGuid) {
+        this._quotesPulseProvider.subscribeQuotes(symbols, fastSymbols, onRealtimeCallback, listenerGuid);
+    };
+    UDFCompatibleDatafeedBase.prototype.unsubscribeQuotes = function (listenerGuid) {
+        this._quotesPulseProvider.unsubscribeQuotes(listenerGuid);
+    };
+    UDFCompatibleDatafeedBase.prototype.calculateHistoryDepth = function (resolution, resolutionBack, intervalBack) {
+        return undefined;
+    };
+    UDFCompatibleDatafeedBase.prototype.getMarks = function (symbolInfo, startDate, endDate, onDataCallback, resolution) {
+        if (!this._configuration.supports_marks) {
+            return;
+        }
+        var requestParams = {
+            symbol: symbolInfo.ticker || '',
+            from: startDate,
+            to: endDate,
+            resolution: resolution,
+        };
+        this._send('marks', requestParams)
+            .then(function (response) {
+            if (!Array.isArray(response)) {
+                var result = [];
+                for (var i = 0; i < response.id.length; ++i) {
+                    result.push({
+                        id: extractField(response, 'id', i),
+                        time: extractField(response, 'time', i),
+                        color: extractField(response, 'color', i),
+                        text: extractField(response, 'text', i),
+                        label: extractField(response, 'label', i),
+                        labelFontColor: extractField(response, 'labelFontColor', i),
+                        minSize: extractField(response, 'minSize', i),
+                    });
+                }
+                response = result;
+            }
+            onDataCallback(response);
+        })
+            .catch(function (error) {
+            logMessage("UdfCompatibleDatafeed: Request marks failed: " + getErrorMessage(error));
+            onDataCallback([]);
+        });
+    };
+    UDFCompatibleDatafeedBase.prototype.getTimescaleMarks = function (symbolInfo, startDate, endDate, onDataCallback, resolution) {
+        if (!this._configuration.supports_timescale_marks) {
+            return;
+        }
+        var requestParams = {
+            symbol: symbolInfo.ticker || '',
+            from: startDate,
+            to: endDate,
+            resolution: resolution,
+        };
+        this._send('timescale_marks', requestParams)
+            .then(function (response) {
+            if (!Array.isArray(response)) {
+                var result = [];
+                for (var i = 0; i < response.id.length; ++i) {
+                    result.push({
+                        id: extractField(response, 'id', i),
+                        time: extractField(response, 'time', i),
+                        color: extractField(response, 'color', i),
+                        label: extractField(response, 'label', i),
+                        tooltip: extractField(response, 'tooltip', i),
+                    });
+                }
+                response = result;
+            }
+            onDataCallback(response);
+        })
+            .catch(function (error) {
+            logMessage("UdfCompatibleDatafeed: Request timescale marks failed: " + getErrorMessage(error));
+            onDataCallback([]);
+        });
+    };
+    UDFCompatibleDatafeedBase.prototype.getServerTime = function (callback) {
+        if (!this._configuration.supports_time) {
+            return;
+        }
+        this._send('time')
+            .then(function (response) {
+            var time = parseInt(response);
+            if (!isNaN(time)) {
+                callback(time);
+            }
+        })
+            .catch(function (error) {
+            logMessage("UdfCompatibleDatafeed: Fail to load server time, error=" + getErrorMessage(error));
+        });
+    };
+    UDFCompatibleDatafeedBase.prototype.searchSymbols = function (userInput, exchange, symbolType, onResult) {
+        if (this._configuration.supports_search) {
+            var params = {
+                limit: 30 /* SearchItemsLimit */,
+                query: userInput.toUpperCase(),
+                type: symbolType,
+                exchange: exchange,
+            };
+            this._send('search', params)
+                .then(function (response) {
+                if (response.s !== undefined) {
+                    logMessage("UdfCompatibleDatafeed: search symbols error=" + response.errmsg);
+                    onResult([]);
+                    return;
+                }
+                onResult(response);
+            })
+                .catch(function (reason) {
+                logMessage("UdfCompatibleDatafeed: Search symbols for '" + userInput + "' failed. Error=" + getErrorMessage(reason));
+                onResult([]);
+            });
+        }
+        else {
+            if (this._symbolsStorage === null) {
+                throw new Error('UdfCompatibleDatafeed: inconsistent configuration (symbols storage)');
+            }
+            this._symbolsStorage.searchSymbols(userInput, exchange, symbolType, 30 /* SearchItemsLimit */)
+                .then(onResult)
+                .catch(onResult.bind(null, []));
+        }
+    };
+    UDFCompatibleDatafeedBase.prototype.resolveSymbol = function (symbolName, onResolve, onError) {
+        logMessage('Resolve requested');
+        var resolveRequestStartTime = Date.now();
+        function onResultReady(symbolInfo) {
+            logMessage("Symbol resolved: " + (Date.now() - resolveRequestStartTime) + "ms");
+            onResolve(symbolInfo);
+        }
+        if (!this._configuration.supports_group_request) {
+            var params = {
+                symbol: symbolName,
+            };
+            this._send('symbols', params)
+                .then(function (response) {
+                if (response.s !== undefined) {
+                    onError('unknown_symbol');
+                }
+                else {
+                    onResultReady(response);
+                }
+            })
+                .catch(function (reason) {
+                logMessage("UdfCompatibleDatafeed: Error resolving symbol: " + getErrorMessage(reason));
+                onError('unknown_symbol');
+            });
+        }
+        else {
+            if (this._symbolsStorage === null) {
+                throw new Error('UdfCompatibleDatafeed: inconsistent configuration (symbols storage)');
+            }
+            this._symbolsStorage.resolveSymbol(symbolName).then(onResultReady).catch(onError);
+        }
+    };
+    UDFCompatibleDatafeedBase.prototype.getBars = function (symbolInfo, resolution, rangeStartDate, rangeEndDate, onResult, onError) {
+        this._historyProvider.getBars(symbolInfo, resolution, rangeStartDate, rangeEndDate)
+            .then(function (result) {
+            onResult(result.bars, result.meta);
+        })
+            .catch(onError);
+    };
+    UDFCompatibleDatafeedBase.prototype.subscribeBars = function (symbolInfo, resolution, onTick, listenerGuid, onResetCacheNeededCallback) {
+        this._dataPulseProvider.subscribeBars(symbolInfo, resolution, onTick, listenerGuid);
+    };
+    UDFCompatibleDatafeedBase.prototype.unsubscribeBars = function (listenerGuid) {
+        this._dataPulseProvider.unsubscribeBars(listenerGuid);
+    };
+    UDFCompatibleDatafeedBase.prototype._requestConfiguration = function () {
+        return this._send('config')
+            .catch(function (reason) {
+            logMessage("UdfCompatibleDatafeed: Cannot get datafeed configuration - use default, error=" + getErrorMessage(reason));
+            return null;
+        });
+    };
+    UDFCompatibleDatafeedBase.prototype._send = function (urlPath, params) {
+        return this._requester.sendRequest(this._datafeedURL, urlPath, params);
+    };
+    UDFCompatibleDatafeedBase.prototype._setupWithConfiguration = function (configurationData) {
+        this._configuration = configurationData;
+        if (configurationData.exchanges === undefined) {
+            configurationData.exchanges = [];
+        }
+        if (!configurationData.supports_search && !configurationData.supports_group_request) {
+            throw new Error('Unsupported datafeed configuration. Must either support search, or support group request');
+        }
+        if (configurationData.supports_group_request || !configurationData.supports_search) {
+            this._symbolsStorage = new SymbolsStorage(this._datafeedURL, configurationData.supported_resolutions || [], this._requester);
+        }
+        logMessage("UdfCompatibleDatafeed: Initialized with " + JSON.stringify(configurationData));
+    };
+    return UDFCompatibleDatafeedBase;
+}());
+export { UDFCompatibleDatafeedBase };
+function defaultConfiguration() {
+    return {
+        supports_search: false,
+        supports_group_request: true,
+        supported_resolutions: ['1', '5', '15', '30', '60', '1D', '1W', '1M'],
+        supports_marks: false,
+        supports_timescale_marks: false,
+    };
+}
--- a/datafeeds/udf/lib/udf-compatible-datafeed.js
+++ b/datafeeds/udf/lib/udf-compatible-datafeed.js
@@ -0,0 +1,17 @@
+import * as tslib_1 from "tslib";
+import { UDFCompatibleDatafeedBase } from './udf-compatible-datafeed-base';
+import { QuotesProvider } from './quotes-provider';
+import { Requester } from './requester';
+var UDFCompatibleDatafeed = /** @class */ (function (_super) {
+    tslib_1.__extends(UDFCompatibleDatafeed, _super);
+    function UDFCompatibleDatafeed(datafeedURL, updateFrequency) {
+        if (updateFrequency === void 0) { updateFrequency = 10 * 1000; }
+        var _this = this;
+        var requester = new Requester();
+        var quotesProvider = new QuotesProvider(datafeedURL, requester);
+        _this = _super.call(this, datafeedURL, quotesProvider, requester, updateFrequency) || this;
+        return _this;
+    }
+    return UDFCompatibleDatafeed;
+}(UDFCompatibleDatafeedBase));
+export { UDFCompatibleDatafeed };
--- a/datafeeds/udf/package.json
+++ b/datafeeds/udf/package.json
@@ -0,0 +1,20 @@
+{
+  "private": true,
+  "dependencies": {
+    "promise-polyfill": "6.0.2",
+    "tslib": "1.7.1",
+    "whatwg-fetch": "2.0.3"
+  },
+  "devDependencies": {
+    "rollup": "0.49.2",
+    "rollup-plugin-buble": "0.15.0",
+    "rollup-plugin-node-resolve": "3.0.0",
+    "rollup-plugin-uglify": "2.0.1",
+    "typescript": "2.5.3"
+  },
+  "scripts": {
+    "compile": "tsc",
+    "bundle-js": "rollup -c rollup.config.js",
+    "build": "npm run compile && npm run bundle-js"
+  }
+}
--- a/datafeeds/udf/rollup.config.js
+++ b/datafeeds/udf/rollup.config.js
@@ -0,0 +1,39 @@
+/* globals process */
+
+var buble = require('rollup-plugin-buble');
+var uglify = require('rollup-plugin-uglify');
+var nodeResolve = require('rollup-plugin-node-resolve');
+
+var environment = process.env.ENV || 'development';
+var isDevelopmentEnv = (environment === 'development');
+
+module.exports = [
+	{
+		input: 'lib/udf-compatible-datafeed.js',
+		name: 'Datafeeds',
+		sourceMap: false,
+		output: {
+			format: 'umd',
+			file: 'dist/bundle.js',
+		},
+		plugins: [
+			nodeResolve({ jsnext: true, main: true }),
+			buble(),
+			!isDevelopmentEnv && uglify({ output: { inline_script: true } }),
+		],
+	},
+	{
+		input: 'src/polyfills.es6',
+		sourceMap: false,
+		context: 'window',
+		output: {
+			format: 'iife',
+			file: 'dist/polyfills.js',
+		},
+		plugins: [
+			nodeResolve({ jsnext: true, main: true }),
+			buble(),
+			uglify({ output: { inline_script: true } }),
+		],
+	},
+];
--- a/datafeeds/udf/src/data-pulse-provider.ts
+++ b/datafeeds/udf/src/data-pulse-provider.ts
@@ -0,0 +1,144 @@
+import {
+	LibrarySymbolInfo,
+	SubscribeBarsCallback,
+} from '../../../charting_library/datafeed-api';
+
+import {
+	GetBarsResult,
+	HistoryProvider,
+} from './history-provider';
+
+import {
+	getErrorMessage,
+	logMessage,
+} from './helpers';
+
+interface DataSubscriber {
+	symbolInfo: LibrarySymbolInfo;
+	resolution: string;
+	lastBarTime: number | null;
+	listener: SubscribeBarsCallback;
+}
+
+interface DataSubscribers {
+	[guid: string]: DataSubscriber;
+}
+
+export class DataPulseProvider {
+	private readonly _subscribers: DataSubscribers = {};
+	private _requestsPending: number = 0;
+	private readonly _historyProvider: HistoryProvider;
+
+	public constructor(historyProvider: HistoryProvider, updateFrequency: number) {
+		this._historyProvider = historyProvider;
+		setInterval(this._updateData.bind(this), updateFrequency);
+	}
+
+	public subscribeBars(symbolInfo: LibrarySymbolInfo, resolution: string, newDataCallback: SubscribeBarsCallback, listenerGuid: string): void {
+		if (this._subscribers.hasOwnProperty(listenerGuid)) {
+			logMessage(`DataPulseProvider: already has subscriber with id=${listenerGuid}`);
+			return;
+		}
+
+		this._subscribers[listenerGuid] = {
+			lastBarTime: null,
+			listener: newDataCallback,
+			resolution: resolution,
+			symbolInfo: symbolInfo,
+		};
+
+		logMessage(`DataPulseProvider: subscribed for #${listenerGuid} - {${symbolInfo.name}, ${resolution}}`);
+	}
+
+	public unsubscribeBars(listenerGuid: string): void {
+		delete this._subscribers[listenerGuid];
+		logMessage(`DataPulseProvider: unsubscribed for #${listenerGuid}`);
+	}
+
+	private _updateData(): void {
+		if (this._requestsPending > 0) {
+			return;
+		}
+
+		this._requestsPending = 0;
+		for (const listenerGuid in this._subscribers) { // tslint:disable-line:forin
+			this._requestsPending += 1;
+			this._updateDataForSubscriber(listenerGuid)
+				.then(() => {
+					this._requestsPending -= 1;
+					logMessage(`DataPulseProvider: data for #${listenerGuid} updated successfully, pending=${this._requestsPending}`);
+				})
+				.catch((reason?: string | Error) => {
+					this._requestsPending -= 1;
+					logMessage(`DataPulseProvider: data for #${listenerGuid} updated with error=${getErrorMessage(reason)}, pending=${this._requestsPending}`);
+				});
+		}
+	}
+
+	private _updateDataForSubscriber(listenerGuid: string): Promise<void> {
+		const subscriptionRecord = this._subscribers[listenerGuid];
+
+		const rangeEndTime = parseInt((Date.now() / 1000).toString());
+
+		// BEWARE: please note we really need 2 bars, not the only last one
+		// see the explanation below. `10` is the `large enough` value to work around holidays
+		const rangeStartTime = rangeEndTime - periodLengthSeconds(subscriptionRecord.resolution, 10);
+
+		return this._historyProvider.getBars(subscriptionRecord.symbolInfo, subscriptionRecord.resolution, rangeStartTime, rangeEndTime)
+			.then((result: GetBarsResult) => {
+				this._onSubscriberDataReceived(listenerGuid, result);
+			});
+	}
+
+	private _onSubscriberDataReceived(listenerGuid: string, result: GetBarsResult): void {
+		// means the subscription was cancelled while waiting for data
+		if (!this._subscribers.hasOwnProperty(listenerGuid)) {
+			logMessage(`DataPulseProvider: Data comes for already unsubscribed subscription #${listenerGuid}`);
+			return;
+		}
+
+		const bars = result.bars;
+		if (bars.length === 0) {
+			return;
+		}
+
+		const lastBar = bars[bars.length - 1];
+		const subscriptionRecord = this._subscribers[listenerGuid];
+
+		if (subscriptionRecord.lastBarTime !== null && lastBar.time < subscriptionRecord.lastBarTime) {
+			return;
+		}
+
+		const isNewBar = subscriptionRecord.lastBarTime !== null && lastBar.time > subscriptionRecord.lastBarTime;
+
+		// Pulse updating may miss some trades data (ie, if pulse period = 10 secods and new bar is started 5 seconds later after the last update, the
+		// old bar's last 5 seconds trades will be lost). Thus, at fist we should broadcast old bar updates when it's ready.
+		if (isNewBar) {
+			if (bars.length < 2) {
+				throw new Error('Not enough bars in history for proper pulse update. Need at least 2.');
+			}
+
+			const previousBar = bars[bars.length - 2];
+			subscriptionRecord.listener(previousBar);
+		}
+
+		subscriptionRecord.lastBarTime = lastBar.time;
+		subscriptionRecord.listener(lastBar);
+	}
+}
+
+function periodLengthSeconds(resolution: string, requiredPeriodsCount: number): number {
+	let daysCount = 0;
+
+	if (resolution === 'D') {
+		daysCount = requiredPeriodsCount;
+	} else if (resolution === 'M') {
+		daysCount = 31 * requiredPeriodsCount;
+	} else if (resolution === 'W') {
+		daysCount = 7 * requiredPeriodsCount;
+	} else {
+		daysCount = requiredPeriodsCount * parseInt(resolution) / (24 * 60);
+	}
+
+	return daysCount * 24 * 60 * 60;
+}
--- a/datafeeds/udf/src/helpers.ts
+++ b/datafeeds/udf/src/helpers.ts
@@ -0,0 +1,37 @@
+export interface RequestParams {
+	[paramName: string]: string | string[] | number;
+}
+
+export interface UdfResponse {
+	s: string;
+}
+
+export interface UdfOkResponse extends UdfResponse {
+	s: 'ok';
+}
+
+export interface UdfErrorResponse {
+	s: 'error';
+	errmsg: string;
+}
+
+/**
+ * If you want to enable logs from datafeed set it to `true`
+ */
+const isLoggingEnabled = false;
+export function logMessage(message: string): void {
+	if (isLoggingEnabled) {
+		const now = new Date();
+		console.log(`${now.toLocaleTimeString()}.${now.getMilliseconds()}> ${message}`);
+	}
+}
+
+export function getErrorMessage(error: string | Error | undefined): string {
+	if (error === undefined) {
+		return '';
+	} else if (typeof error === 'string') {
+		return error;
+	}
+
+	return error.message;
+}
--- a/datafeeds/udf/src/history-provider.ts
+++ b/datafeeds/udf/src/history-provider.ts
@@ -0,0 +1,119 @@
+import {
+	Bar,
+	HistoryMetadata,
+	LibrarySymbolInfo,
+} from '../../../charting_library/datafeed-api';
+
+import {
+	getErrorMessage,
+	RequestParams,
+	UdfErrorResponse,
+	UdfOkResponse,
+	UdfResponse,
+} from './helpers';
+
+import { Requester } from './requester';
+
+interface HistoryPartialDataResponse extends UdfOkResponse {
+	t: number[];
+	c: number[];
+	o?: never;
+	h?: never;
+	l?: never;
+	v?: never;
+}
+
+interface HistoryFullDataResponse extends UdfOkResponse {
+	t: number[];
+	c: number[];
+	o: number[];
+	h: number[];
+	l: number[];
+	v: number[];
+}
+
+interface HistoryNoDataResponse extends UdfResponse {
+	s: 'no_data';
+	nextTime?: number;
+}
+
+type HistoryResponse = HistoryFullDataResponse | HistoryPartialDataResponse | HistoryNoDataResponse;
+
+export interface GetBarsResult {
+	bars: Bar[];
+	meta: HistoryMetadata;
+}
+
+export class HistoryProvider {
+	private _datafeedUrl: string;
+	private readonly _requester: Requester;
+
+	public constructor(datafeedUrl: string, requester: Requester) {
+		this._datafeedUrl = datafeedUrl;
+		this._requester = requester;
+	}
+
+	public getBars(symbolInfo: LibrarySymbolInfo, resolution: string, rangeStartDate: number, rangeEndDate: number): Promise<GetBarsResult> {
+		const requestParams: RequestParams = {
+			symbol: symbolInfo.ticker || '',
+			resolution: resolution,
+			from: rangeStartDate,
+			to: rangeEndDate,
+		};
+
+		return new Promise((resolve: (result: GetBarsResult) => void, reject: (reason: string) => void) => {
+			this._requester.sendRequest<HistoryResponse>(this._datafeedUrl, 'history', requestParams)
+				.then((response: HistoryResponse | UdfErrorResponse) => {
+					if (response.s !== 'ok' && response.s !== 'no_data') {
+						reject(response.errmsg);
+						return;
+					}
+
+					const bars: Bar[] = [];
+					const meta: HistoryMetadata = {
+						noData: false,
+					};
+
+					if (response.s === 'no_data') {
+						meta.noData = true;
+						meta.nextTime = response.nextTime;
+					} else {
+						const volumePresent = response.v !== undefined;
+						const ohlPresent = response.o !== undefined;
+
+						for (let i = 0; i < response.t.length; ++i) {
+							const barValue: Bar = {
+								time: response.t[i] * 1000,
+								close: Number(response.c[i]),
+								open: Number(response.c[i]),
+								high: Number(response.c[i]),
+								low: Number(response.c[i]),
+							};
+
+							if (ohlPresent) {
+								barValue.open = Number((response as HistoryFullDataResponse).o[i]);
+								barValue.high = Number((response as HistoryFullDataResponse).h[i]);
+								barValue.low = Number((response as HistoryFullDataResponse).l[i]);
+							}
+
+							if (volumePresent) {
+								barValue.volume = Number((response as HistoryFullDataResponse).v[i]);
+							}
+
+							bars.push(barValue);
+						}
+					}
+
+					resolve({
+						bars: bars,
+						meta: meta,
+					});
+				})
+				.catch((reason?: string | Error) => {
+					const reasonString = getErrorMessage(reason);
+					console.warn(`HistoryProvider: getBars() failed, error=${reasonString}`);
+					reject(reasonString);
+				});
+		});
+	}
+}
--- a/datafeeds/udf/src/iquotes-provider.ts
+++ b/datafeeds/udf/src/iquotes-provider.ts
@@ -0,0 +1,14 @@
+import { QuoteData } from '../../../charting_library/datafeed-api';
+
+import {
+	UdfOkResponse,
+} from './helpers';
+
+export interface UdfQuotesResponse extends UdfOkResponse {
+	d: QuoteData[];
+}
+
+export interface IQuotesProvider {
+	// tslint:disable-next-line:variable-name tv-variable-name
+	getQuotes(symbols: string[]): Promise<QuoteData[]>;
+}
--- a/datafeeds/udf/src/polyfills.es6
+++ b/datafeeds/udf/src/polyfills.es6
@@ -0,0 +1,2 @@
+import 'promise-polyfill';
+import 'whatwg-fetch';
--- a/datafeeds/udf/src/quotes-provider.ts
+++ b/datafeeds/udf/src/quotes-provider.ts
@@ -0,0 +1,37 @@
+import { UdfQuotesResponse, IQuotesProvider } from './iquotes-provider';
+import { QuoteData } from '../../../charting_library/datafeed-api';
+
+import {
+	getErrorMessage,
+	logMessage,
+	UdfErrorResponse,
+} from './helpers';
+import { Requester } from './requester';
+
+export class QuotesProvider implements IQuotesProvider {
+	private readonly _datafeedUrl: string;
+	private readonly _requester: Requester;
+
+	public constructor(datafeedUrl: string, requester: Requester) {
+		this._datafeedUrl = datafeedUrl;
+		this._requester = requester;
+	}
+
+	public getQuotes(symbols: string[]): Promise<QuoteData[]> {
+		return new Promise((resolve: (data: QuoteData[]) => void, reject: (reason: string) => void) => {
+			this._requester.sendRequest<UdfQuotesResponse>(this._datafeedUrl, 'quotes', { symbols: symbols })
+				.then((response: UdfQuotesResponse | UdfErrorResponse) => {
+					if (response.s === 'ok') {
+						resolve(response.d);
+					} else {
+						reject(response.errmsg);
+					}
+				})
+				.catch((error?: string | Error) => {
+					const errorMessage = getErrorMessage(error);
+					logMessage(`QuotesProvider: getQuotes failed, error=${errorMessage}`);
+					reject(`network error: ${errorMessage}`);
+				});
+		});
+	}
+}
--- a/datafeeds/udf/src/quotes-pulse-provider.ts
+++ b/datafeeds/udf/src/quotes-pulse-provider.ts
@@ -0,0 +1,85 @@
+import {
+	QuoteData,
+	QuotesCallback,
+} from '../../../charting_library/datafeed-api';
+
+import {
+	getErrorMessage,
+	logMessage,
+} from './helpers';
+
+import { IQuotesProvider } from './iquotes-provider';
+
+interface QuoteSubscriber {
+	symbols: string[];
+	fastSymbols: string[];
+	listener: QuotesCallback;
+}
+
+interface QuoteSubscribers {
+	[listenerId: string]: QuoteSubscriber;
+}
+
+const enum SymbolsType {
+	General,
+	Fast,
+}
+
+const enum UpdateTimeouts {
+	Fast = 10 * 1000,
+	General = 60 * 1000,
+}
+
+export class QuotesPulseProvider {
+	private readonly _quotesProvider: IQuotesProvider;
+	private readonly _subscribers: QuoteSubscribers = {};
+	private _requestsPending: number = 0;
+
+	public constructor(quotesProvider: IQuotesProvider) {
+		this._quotesProvider = quotesProvider;
+
+		setInterval(this._updateQuotes.bind(this, SymbolsType.Fast), UpdateTimeouts.Fast);
+		setInterval(this._updateQuotes.bind(this, SymbolsType.General), UpdateTimeouts.General);
+	}
+
+	public subscribeQuotes(symbols: string[], fastSymbols: string[], onRealtimeCallback: QuotesCallback, listenerGuid: string): void {
+		this._subscribers[listenerGuid] = {
+			symbols: symbols,
+			fastSymbols: fastSymbols,
+			listener: onRealtimeCallback,
+		};
+
+		logMessage(`QuotesPulseProvider: subscribed quotes with #${listenerGuid}`);
+	}
+
+	public unsubscribeQuotes(listenerGuid: string): void {
+		delete this._subscribers[listenerGuid];
+		logMessage(`QuotesPulseProvider: unsubscribed quotes with #${listenerGuid}`);
+	}
+
+	private _updateQuotes(updateType: SymbolsType): void {
+		if (this._requestsPending > 0) {
+			return;
+		}
+
+		for (const listenerGuid in this._subscribers) { // tslint:disable-line:forin
+			this._requestsPending++;
+
+			const subscriptionRecord = this._subscribers[listenerGuid];
+			this._quotesProvider.getQuotes(updateType === SymbolsType.Fast ? subscriptionRecord.fastSymbols : subscriptionRecord.symbols)
+				.then((data: QuoteData[]) => {
+					this._requestsPending--;
+					if (!this._subscribers.hasOwnProperty(listenerGuid)) {
+						return;
+					}
+
+					subscriptionRecord.listener(data);
+					logMessage(`QuotesPulseProvider: data for #${listenerGuid} (${updateType}) updated successfully, pending=${this._requestsPending}`);
+				})
+				.catch((reason?: string | Error) => {
+					this._requestsPending--;
+					logMessage(`QuotesPulseProvider: data for #${listenerGuid} (${updateType}) updated with error=${getErrorMessage(reason)}, pending=${this._requestsPending}`);
+				});
+		}
+	}
+}
--- a/datafeeds/udf/src/requester.ts
+++ b/datafeeds/udf/src/requester.ts
@@ -0,0 +1,37 @@
+import { RequestParams, UdfResponse, UdfErrorResponse, logMessage } from './helpers';
+
+export class Requester {
+	private _headers: object | undefined;
+
+	public constructor(headers?: object) {
+		if (headers) {
+			this._headers = headers;
+		}
+	}
+
+	public sendRequest<T extends UdfResponse>(datafeedUrl: string, urlPath: string, params?: RequestParams): Promise<T | UdfErrorResponse>;
+	public sendRequest<T>(datafeedUrl: string, urlPath: string, params?: RequestParams): Promise<T>;
+	public sendRequest<T>(datafeedUrl: string, urlPath: string, params?: RequestParams): Promise<T> {
+		if (params !== undefined) {
+			const paramKeys = Object.keys(params);
+			if (paramKeys.length !== 0) {
+				urlPath += '?';
+			}
+
+			urlPath += paramKeys.map((key: string) => {
+				return `${encodeURIComponent(key)}=${encodeURIComponent(params[key].toString())}`;
+			}).join('&');
+		}
+
+		logMessage('New request: ' + urlPath);
+
+		const options: RequestInit = {};
+		if (this._headers !== undefined) {
+			options.headers = this._headers;
+		}
+
+		return fetch(`${datafeedUrl}/${urlPath}`, options)
+			.then((response: Response) => response.text())
+			.then((responseTest: string) => JSON.parse(responseTest));
+	}
+}
--- a/datafeeds/udf/src/symbols-storage.ts
+++ b/datafeeds/udf/src/symbols-storage.ts
@@ -0,0 +1,266 @@
+import {
+	LibrarySymbolInfo,
+	SearchSymbolResultItem,
+} from '../../../charting_library/datafeed-api';
+
+import {
+	getErrorMessage,
+	logMessage,
+} from './helpers';
+
+import { Requester } from './requester';
+
+interface SymbolInfoMap {
+	[symbol: string]: LibrarySymbolInfo | undefined;
+}
+
+interface ExchangeDataResponseOptionalValues {
+	'ticker': string;
+
+	'minmov2': number;
+	'minmove2': number;
+
+	'minmov': number;
+	'minmovement': number;
+
+	'supported-resolutions': string[];
+
+	'force-session-rebuild': boolean;
+
+	'has-intraday': boolean;
+	'has-daily': boolean;
+	'has-weekly-and-monthly': boolean;
+	'has-empty-bars': boolean;
+	'has-no-volume': boolean;
+
+	'intraday-multipliers': string[];
+
+	'volume-precision': number;
+}
+
+interface ExchangeDataResponseMandatoryValues {
+	'type': string;
+	'timezone': LibrarySymbolInfo['timezone'];
+	'description': string;
+
+	'exchange-listed': string;
+	'exchange-traded': string;
+
+	'session-regular': string;
+
+	'fractional': boolean;
+
+	'pricescale': number;
+}
+
+// Here is some black magic with types to get compile-time checks of names and types
+type ValueOrArray<T> = T | T[];
+type ExchangeDataResponse =
+	{
+		symbol: string[];
+	} &
+	{
+		[K in keyof ExchangeDataResponseMandatoryValues]: ValueOrArray<ExchangeDataResponseMandatoryValues[K]>;
+	} &
+	{
+		[K in keyof ExchangeDataResponseOptionalValues]?: ValueOrArray<ExchangeDataResponseOptionalValues[K]>;
+	};
+
+function extractField<Field extends keyof ExchangeDataResponseMandatoryValues>(data: ExchangeDataResponse, field: Field, arrayIndex: number): ExchangeDataResponseMandatoryValues[Field];
+function extractField<Field extends keyof ExchangeDataResponseOptionalValues>(data: ExchangeDataResponse, field: Field, arrayIndex: number): ExchangeDataResponseOptionalValues[Field] | undefined;
+function extractField<Field extends keyof ExchangeDataResponseMandatoryValues>(data: ExchangeDataResponse, field: Field, arrayIndex: number): (ExchangeDataResponseMandatoryValues & ExchangeDataResponseOptionalValues)[Field] | undefined {
+	const value = data[field];
+	return Array.isArray(value) ? value[arrayIndex] : value;
+}
+
+export class SymbolsStorage {
+	private readonly _exchangesList: string[] = ['NYSE', 'FOREX', 'AMEX'];
+	private readonly _symbolsInfo: SymbolInfoMap = {};
+	private readonly _symbolsList: string[] = [];
+	private readonly _datafeedUrl: string;
+	private readonly _readyPromise: Promise<void>;
+	private readonly _datafeedSupportedResolutions: string[];
+	private readonly _requester: Requester;
+
+	public constructor(datafeedUrl: string, datafeedSupportedResolutions: string[], requester: Requester) {
+		this._datafeedUrl = datafeedUrl;
+		this._datafeedSupportedResolutions = datafeedSupportedResolutions;
+		this._requester = requester;
+		this._readyPromise = this._init();
+		this._readyPromise.catch((error: Error) => {
+			// seems it is impossible
+			console.error(`SymbolsStorage: Cannot init, error=${error.toString()}`);
+		});
+	}
+
+	// BEWARE: this function does not consider symbol's exchange
+	public resolveSymbol(symbolName: string): Promise<LibrarySymbolInfo> {
+		return this._readyPromise.then(() => {
+			const symbolInfo = this._symbolsInfo[symbolName];
+			if (symbolInfo === undefined) {
+				return Promise.reject('invalid symbol');
+			}
+
+			return Promise.resolve(symbolInfo);
+		});
+	}
+
+	public searchSymbols(searchString: string, exchange: string, symbolType: string, maxSearchResults: number): Promise<SearchSymbolResultItem[]> {
+		interface WeightedItem {
+			symbolInfo: LibrarySymbolInfo;
+			weight: number;
+		}
+
+		return this._readyPromise.then(() => {
+			const weightedResult: WeightedItem[] = [];
+			const queryIsEmpty = searchString.length === 0;
+
+			searchString = searchString.toUpperCase();
+
+			for (const symbolName of this._symbolsList) {
+				const symbolInfo = this._symbolsInfo[symbolName];
+
+				if (symbolInfo === undefined) {
+					continue;
+				}
+
+				if (symbolType.length > 0 && symbolInfo.type !== symbolType) {
+					continue;
+				}
+
+				if (exchange && exchange.length > 0 && symbolInfo.exchange !== exchange) {
+					continue;
+				}
+
+				const positionInName = symbolInfo.name.toUpperCase().indexOf(searchString);
+				const positionInDescription = symbolInfo.description.toUpperCase().indexOf(searchString);
+
+				if (queryIsEmpty || positionInName >= 0 || positionInDescription >= 0) {
+					const alreadyExists = weightedResult.some((item: WeightedItem) => item.symbolInfo === symbolInfo);
+					if (!alreadyExists) {
+						const weight = positionInName >= 0 ? positionInName : 8000 + positionInDescription;
+						weightedResult.push({ symbolInfo: symbolInfo, weight: weight });
+					}
+				}
+			}
+
+			const result = weightedResult
+				.sort((item1: WeightedItem, item2: WeightedItem) => item1.weight - item2.weight)
+				.slice(0, maxSearchResults)
+				.map((item: WeightedItem) => {
+					const symbolInfo = item.symbolInfo;
+					return {
+						symbol: symbolInfo.name,
+						full_name: symbolInfo.full_name,
+						description: symbolInfo.description,
+						exchange: symbolInfo.exchange,
+						params: [],
+						type: symbolInfo.type,
+						ticker: symbolInfo.name,
+					};
+				});
+
+			return Promise.resolve(result);
+		});
+	}
+
+	private _init(): Promise<void> {
+		interface BooleanMap {
+			[key: string]: boolean | undefined;
+		}
+
+		const promises: Promise<void>[] = [];
+		const alreadyRequestedExchanges: BooleanMap = {};
+
+		for (const exchange of this._exchangesList) {
+			if (alreadyRequestedExchanges[exchange]) {
+				continue;
+			}
+
+			alreadyRequestedExchanges[exchange] = true;
+			promises.push(this._requestExchangeData(exchange));
+		}
+
+		return Promise.all(promises)
+			.then(() => {
+				this._symbolsList.sort();
+				logMessage('SymbolsStorage: All exchanges data loaded');
+			});
+	}
+
+	private _requestExchangeData(exchange: string): Promise<void> {
+		return new Promise((resolve: () => void, reject: (error: Error) => void) => {
+			this._requester.sendRequest<ExchangeDataResponse>(this._datafeedUrl, 'symbol_info', { group: exchange })
+				.then((response: ExchangeDataResponse) => {
+					try {
+						this._onExchangeDataReceived(exchange, response);
+					} catch (error) {
+						reject(error);
+						return;
+					}
+
+					resolve();
+				})
+				.catch((reason?: string | Error) => {
+					logMessage(`SymbolsStorage: Request data for exchange '${exchange}' failed, reason=${getErrorMessage(reason)}`);
+					resolve();
+				});
+		});
+	}
+
+	private _onExchangeDataReceived(exchange: string, data: ExchangeDataResponse): void {
+		let symbolIndex = 0;
+
+		try {
+			const symbolsCount = data.symbol.length;
+			const tickerPresent = data.ticker !== undefined;
+
+			for (; symbolIndex < symbolsCount; ++symbolIndex) {
+				const symbolName = data.symbol[symbolIndex];
+				const listedExchange = extractField(data, 'exchange-listed', symbolIndex);
+				const tradedExchange = extractField(data, 'exchange-traded', symbolIndex);
+				const fullName = tradedExchange + ':' + symbolName;
+
+				const ticker = tickerPresent ? (extractField(data, 'ticker', symbolIndex) as string) : symbolName;
+
+				const symbolInfo: LibrarySymbolInfo = {
+					ticker: ticker,
+					name: symbolName,
+					base_name: [listedExchange + ':' + symbolName],
+					full_name: fullName,
+					listed_exchange: listedExchange,
+					exchange: tradedExchange,
+					description: extractField(data, 'description', symbolIndex),
+					has_intraday: definedValueOrDefault(extractField(data, 'has-intraday', symbolIndex), false),
+					has_no_volume: definedValueOrDefault(extractField(data, 'has-no-volume', symbolIndex), false),
+					minmov: extractField(data, 'minmovement', symbolIndex) || extractField(data, 'minmov', symbolIndex) || 0,
+					minmove2: extractField(data, 'minmove2', symbolIndex) || extractField(data, 'minmov2', symbolIndex),
+					fractional: extractField(data, 'fractional', symbolIndex),
+					pricescale: extractField(data, 'pricescale', symbolIndex),
+					type: extractField(data, 'type', symbolIndex),
+					session: extractField(data, 'session-regular', symbolIndex),
+					timezone: extractField(data, 'timezone', symbolIndex),
+					supported_resolutions: definedValueOrDefault(extractField(data, 'supported-resolutions', symbolIndex), this._datafeedSupportedResolutions),
+					force_session_rebuild: extractField(data, 'force-session-rebuild', symbolIndex),
+					has_daily: definedValueOrDefault(extractField(data, 'has-daily', symbolIndex), true),
+					intraday_multipliers: definedValueOrDefault(extractField(data, 'intraday-multipliers', symbolIndex), ['1', '5', '15', '30', '60']),
+					has_weekly_and_monthly: extractField(data, 'has-weekly-and-monthly', symbolIndex),
+					has_empty_bars: extractField(data, 'has-empty-bars', symbolIndex),
+					volume_precision: definedValueOrDefault(extractField(data, 'volume-precision', symbolIndex), 0),
+				};
+
+				this._symbolsInfo[ticker] = symbolInfo;
+				this._symbolsInfo[symbolName] = symbolInfo;
+				this._symbolsInfo[fullName] = symbolInfo;
+
+				this._symbolsList.push(symbolName);
+			}
+		} catch (error) {
+			throw new Error(`SymbolsStorage: API error when processing exchange ${exchange} symbol #${symbolIndex} (${data.symbol[symbolIndex]}): ${error.message}`);
+		}
+	}
+}
+
+function definedValueOrDefault<T>(value: T | undefined, defaultValue: T): T {
+	return value !== undefined ? value : defaultValue;
+}
--- a/datafeeds/udf/src/udf-compatible-datafeed-base.ts
+++ b/datafeeds/udf/src/udf-compatible-datafeed-base.ts
@@ -0,0 +1,355 @@
+import {
+	DatafeedConfiguration,
+	ErrorCallback,
+	GetMarksCallback,
+	HistoryCallback,
+	HistoryDepth,
+	IDatafeedChartApi,
+	IDatafeedQuotesApi,
+	IExternalDatafeed,
+	LibrarySymbolInfo,
+	Mark,
+	OnReadyCallback,
+	QuotesCallback,
+	ResolutionBackValues,
+	ResolutionString,
+	ResolveCallback,
+	SearchSymbolResultItem,
+	SearchSymbolsCallback,
+	ServerTimeCallback,
+	SubscribeBarsCallback,
+	TimescaleMark,
+} from '../../../charting_library/datafeed-api';
+
+import {
+	getErrorMessage,
+	logMessage,
+	RequestParams,
+	UdfErrorResponse,
+} from './helpers';
+
+import {
+	GetBarsResult,
+	HistoryProvider,
+} from './history-provider';
+
+import { IQuotesProvider } from './iquotes-provider';
+import { DataPulseProvider } from './data-pulse-provider';
+import { QuotesPulseProvider } from './quotes-pulse-provider';
+import { SymbolsStorage } from './symbols-storage';
+import { Requester } from './requester';
+
+export interface UdfCompatibleConfiguration extends DatafeedConfiguration {
+	// tslint:disable
+	supports_search?: boolean;
+	supports_group_request?: boolean;
+	// tslint:enable
+}
+
+export interface ResolveSymbolResponse extends LibrarySymbolInfo {
+	s: undefined;
+}
+
+// it is hack to let's TypeScript make code flow analysis
+export interface UdfSearchSymbolsResponse extends Array<SearchSymbolResultItem> {
+	s?: undefined;
+}
+
+export const enum Constants {
+	SearchItemsLimit = 30,
+}
+
+type UdfDatafeedMarkType<T extends TimescaleMark | Mark> = {
+	[K in keyof T]: T[K] | T[K][];
+} & {
+	id: (string | number)[];
+};
+
+type UdfDatafeedMark = UdfDatafeedMarkType<Mark>;
+type UdfDatafeedTimescaleMark = UdfDatafeedMarkType<TimescaleMark>;
+
+function extractField<Field extends keyof Mark>(data: UdfDatafeedMark, field: Field, arrayIndex: number): Mark[Field];
+function extractField<Field extends keyof TimescaleMark>(data: UdfDatafeedTimescaleMark, field: Field, arrayIndex: number): TimescaleMark[Field];
+function extractField<Field extends keyof (TimescaleMark & Mark)>(data: UdfDatafeedMark & UdfDatafeedTimescaleMark, field: Field, arrayIndex: number): (TimescaleMark & Mark)[Field] {
+	const value = data[field];
+	return Array.isArray(value) ? value[arrayIndex] : value;
+}
+
+/**
+ * This class implements interaction with UDF-compatible datafeed.
+ * See UDF protocol reference at https://github.com/tradingview/charting_library/wiki/UDF
+ */
+export class UDFCompatibleDatafeedBase implements IExternalDatafeed, IDatafeedQuotesApi, IDatafeedChartApi {
+	protected _configuration: UdfCompatibleConfiguration = defaultConfiguration();
+	private readonly _datafeedURL: string;
+	private readonly _configurationReadyPromise: Promise<void>;
+
+	private _symbolsStorage: SymbolsStorage | null = null;
+
+	private readonly _historyProvider: HistoryProvider;
+	private readonly _dataPulseProvider: DataPulseProvider;
+
+	private readonly _quotesProvider: IQuotesProvider;
+	private readonly _quotesPulseProvider: QuotesPulseProvider;
+
+	private readonly _requester: Requester;
+
+	protected constructor(datafeedURL: string, quotesProvider: IQuotesProvider, requester: Requester, updateFrequency: number = 10 * 1000) {
+		this._datafeedURL = datafeedURL;
+		this._requester = requester;
+		this._historyProvider = new HistoryProvider(datafeedURL, this._requester);
+		this._quotesProvider = quotesProvider;
+
+		this._dataPulseProvider = new DataPulseProvider(this._historyProvider, updateFrequency);
+		this._quotesPulseProvider = new QuotesPulseProvider(this._quotesProvider);
+
+		this._configurationReadyPromise = this._requestConfiguration()
+			.then((configuration: UdfCompatibleConfiguration | null) => {
+				if (configuration === null) {
+					configuration = defaultConfiguration();
+				}
+
+				this._setupWithConfiguration(configuration);
+			});
+	}
+
+	public onReady(callback: OnReadyCallback): void {
+		this._configurationReadyPromise.then(() => {
+			callback(this._configuration);
+		});
+	}
+
+	public getQuotes(symbols: string[], onDataCallback: QuotesCallback, onErrorCallback: (msg: string) => void): void {
+		this._quotesProvider.getQuotes(symbols).then(onDataCallback).catch(onErrorCallback);
+	}
+
+	public subscribeQuotes(symbols: string[], fastSymbols: string[], onRealtimeCallback: QuotesCallback, listenerGuid: string): void {
+		this._quotesPulseProvider.subscribeQuotes(symbols, fastSymbols, onRealtimeCallback, listenerGuid);
+	}
+
+	public unsubscribeQuotes(listenerGuid: string): void {
+		this._quotesPulseProvider.unsubscribeQuotes(listenerGuid);
+	}
+
+	public calculateHistoryDepth(resolution: ResolutionString, resolutionBack: ResolutionBackValues, intervalBack: number): HistoryDepth | undefined {
+		return undefined;
+	}
+
+	public getMarks(symbolInfo: LibrarySymbolInfo, startDate: number, endDate: number, onDataCallback: GetMarksCallback<Mark>, resolution: ResolutionString): void {
+		if (!this._configuration.supports_marks) {
+			return;
+		}
+
+		const requestParams: RequestParams = {
+			symbol: symbolInfo.ticker || '',
+			from: startDate,
+			to: endDate,
+			resolution: resolution,
+		};
+
+		this._send('marks', requestParams)
+			.then((response: Mark[] | UdfDatafeedMark) => {
+				if (!Array.isArray(response)) {
+					const result: Mark[] = [];
+					for (let i = 0; i < response.id.length; ++i) {
+						result.push({
+							id: extractField(response, 'id', i),
+							time: extractField(response, 'time', i),
+							color: extractField(response, 'color', i),
+							text: extractField(response, 'text', i),
+							label: extractField(response, 'label', i),
+							labelFontColor: extractField(response, 'labelFontColor', i),
+							minSize: extractField(response, 'minSize', i),
+						});
+					}
+
+					response = result;
+				}
+
+				onDataCallback(response);
+			})
+			.catch((error?: string | Error) => {
+				logMessage(`UdfCompatibleDatafeed: Request marks failed: ${getErrorMessage(error)}`);
+				onDataCallback([]);
+			});
+	}
+
+	public getTimescaleMarks(symbolInfo: LibrarySymbolInfo, startDate: number, endDate: number, onDataCallback: GetMarksCallback<TimescaleMark>, resolution: ResolutionString): void {
+		if (!this._configuration.supports_timescale_marks) {
+			return;
+		}
+
+		const requestParams: RequestParams = {
+			symbol: symbolInfo.ticker || '',
+			from: startDate,
+			to: endDate,
+			resolution: resolution,
+		};
+
+		this._send('timescale_marks', requestParams)
+			.then((response: TimescaleMark[] | UdfDatafeedTimescaleMark) => {
+				if (!Array.isArray(response)) {
+					const result: TimescaleMark[] = [];
+					for (let i = 0; i < response.id.length; ++i) {
+						result.push({
+							id: extractField(response, 'id', i),
+							time: extractField(response, 'time', i),
+							color: extractField(response, 'color', i),
+							label: extractField(response, 'label', i),
+							tooltip: extractField(response, 'tooltip', i),
+						});
+					}
+
+					response = result;
+				}
+
+				onDataCallback(response);
+			})
+			.catch((error?: string | Error) => {
+				logMessage(`UdfCompatibleDatafeed: Request timescale marks failed: ${getErrorMessage(error)}`);
+				onDataCallback([]);
+			});
+	}
+
+	public getServerTime(callback: ServerTimeCallback): void {
+		if (!this._configuration.supports_time) {
+			return;
+		}
+
+		this._send('time')
+			.then((response: string) => {
+				const time = parseInt(response);
+				if (!isNaN(time)) {
+					callback(time);
+				}
+			})
+			.catch((error?: string | Error) => {
+				logMessage(`UdfCompatibleDatafeed: Fail to load server time, error=${getErrorMessage(error)}`);
+			});
+	}
+
+	public searchSymbols(userInput: string, exchange: string, symbolType: string, onResult: SearchSymbolsCallback): void {
+		if (this._configuration.supports_search) {
+			const params: RequestParams = {
+				limit: Constants.SearchItemsLimit,
+				query: userInput.toUpperCase(),
+				type: symbolType,
+				exchange: exchange,
+			};
+
+			this._send('search', params)
+				.then((response: UdfSearchSymbolsResponse | UdfErrorResponse) => {
+					if (response.s !== undefined) {
+						logMessage(`UdfCompatibleDatafeed: search symbols error=${response.errmsg}`);
+						onResult([]);
+						return;
+					}
+
+					onResult(response);
+				})
+				.catch((reason?: string | Error) => {
+					logMessage(`UdfCompatibleDatafeed: Search symbols for '${userInput}' failed. Error=${getErrorMessage(reason)}`);
+					onResult([]);
+				});
+		} else {
+			if (this._symbolsStorage === null) {
+				throw new Error('UdfCompatibleDatafeed: inconsistent configuration (symbols storage)');
+			}
+
+			this._symbolsStorage.searchSymbols(userInput, exchange, symbolType, Constants.SearchItemsLimit)
+				.then(onResult)
+				.catch(onResult.bind(null, []));
+		}
+	}
+
+	public resolveSymbol(symbolName: string, onResolve: ResolveCallback, onError: ErrorCallback): void {
+		logMessage('Resolve requested');
+
+		const resolveRequestStartTime = Date.now();
+		function onResultReady(symbolInfo: LibrarySymbolInfo): void {
+			logMessage(`Symbol resolved: ${Date.now() - resolveRequestStartTime}ms`);
+			onResolve(symbolInfo);
+		}
+
+		if (!this._configuration.supports_group_request) {
+			const params: RequestParams = {
+				symbol: symbolName,
+			};
+
+			this._send('symbols', params)
+				.then((response: ResolveSymbolResponse | UdfErrorResponse) => {
+					if (response.s !== undefined) {
+						onError('unknown_symbol');
+					} else {
+						onResultReady(response);
+					}
+				})
+				.catch((reason?: string | Error) => {
+					logMessage(`UdfCompatibleDatafeed: Error resolving symbol: ${getErrorMessage(reason)}`);
+					onError('unknown_symbol');
+				});
+		} else {
+			if (this._symbolsStorage === null) {
+				throw new Error('UdfCompatibleDatafeed: inconsistent configuration (symbols storage)');
+			}
+
+			this._symbolsStorage.resolveSymbol(symbolName).then(onResultReady).catch(onError);
+		}
+	}
+
+	public getBars(symbolInfo: LibrarySymbolInfo, resolution: ResolutionString, rangeStartDate: number, rangeEndDate: number, onResult: HistoryCallback, onError: ErrorCallback): void {
+		this._historyProvider.getBars(symbolInfo, resolution, rangeStartDate, rangeEndDate)
+			.then((result: GetBarsResult) => {
+				onResult(result.bars, result.meta);
+			})
+			.catch(onError);
+	}
+
+	public subscribeBars(symbolInfo: LibrarySymbolInfo, resolution: ResolutionString, onTick: SubscribeBarsCallback, listenerGuid: string, onResetCacheNeededCallback: () => void): void {
+		this._dataPulseProvider.subscribeBars(symbolInfo, resolution, onTick, listenerGuid);
+	}
+
+	public unsubscribeBars(listenerGuid: string): void {
+		this._dataPulseProvider.unsubscribeBars(listenerGuid);
+	}
+
+	protected _requestConfiguration(): Promise<UdfCompatibleConfiguration | null> {
+		return this._send<UdfCompatibleConfiguration>('config')
+			.catch((reason?: string | Error) => {
+				logMessage(`UdfCompatibleDatafeed: Cannot get datafeed configuration - use default, error=${getErrorMessage(reason)}`);
+				return null;
+			});
+	}
+
+	private _send<T>(urlPath: string, params?: RequestParams): Promise<T> {
+		return this._requester.sendRequest<T>(this._datafeedURL, urlPath, params);
+	}
+
+	private _setupWithConfiguration(configurationData: UdfCompatibleConfiguration): void {
+		this._configuration = configurationData;
+
+		if (configurationData.exchanges === undefined) {
+			configurationData.exchanges = [];
+		}
+
+		if (!configurationData.supports_search && !configurationData.supports_group_request) {
+			throw new Error('Unsupported datafeed configuration. Must either support search, or support group request');
+		}
+
+		if (configurationData.supports_group_request || !configurationData.supports_search) {
+			this._symbolsStorage = new SymbolsStorage(this._datafeedURL, configurationData.supported_resolutions || [], this._requester);
+		}
+
+		logMessage(`UdfCompatibleDatafeed: Initialized with ${JSON.stringify(configurationData)}`);
+	}
+}
+
+function defaultConfiguration(): UdfCompatibleConfiguration {
+	return {
+		supports_search: false,
+		supports_group_request: true,
+		supported_resolutions: ['1', '5', '15', '30', '60', '1D', '1W', '1M'],
+		supports_marks: false,
+		supports_timescale_marks: false,
+	};
+}
--- a/datafeeds/udf/src/udf-compatible-datafeed.ts
+++ b/datafeeds/udf/src/udf-compatible-datafeed.ts
@@ -0,0 +1,11 @@
+import { UDFCompatibleDatafeedBase } from './udf-compatible-datafeed-base';
+import { QuotesProvider } from './quotes-provider';
+import { Requester } from './requester';
+
+export class UDFCompatibleDatafeed extends UDFCompatibleDatafeedBase {
+	public constructor(datafeedURL: string, updateFrequency: number = 10 * 1000) {
+		const requester = new Requester();
+		const quotesProvider = new QuotesProvider(datafeedURL, requester);
+		super(datafeedURL, quotesProvider, requester, updateFrequency);
+	}
+}
--- a/datafeeds/udf/tsconfig.json
+++ b/datafeeds/udf/tsconfig.json
@@ -0,0 +1,25 @@
+{
+	"compilerOptions": {
+		"baseUrl": "./src",
+		"importHelpers": true,
+		"lib": [
+			"dom",
+			"es2015.promise",
+			"es2015.symbol.wellknown",
+			"es5"
+		],
+		"module": "es6",
+		"moduleResolution": "node",
+		"noEmitOnError": true,
+		"noFallthroughCasesInSwitch": true,
+		"noImplicitReturns": true,
+		"noUnusedLocals": true,
+		"outDir": "./lib/",
+		"sourceMap": false,
+		"strict": true,
+		"target": "es5"
+	},
+	"include": [
+		"./src/**/*.ts"
+	]
+}