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docs/ccxt/wiki/examples/ts/fetch-ohlcv-many-exchanges-continuosly.md

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+- [Fetch Ohlcv Many Exchanges Continuosly](./examples/ts/)
+
+
+ ```javascript
+ import ccxt from '../../js/ccxt.js';
+
+// AUTO-TRANSPILE //
+
+// fetch and handle constinuosly
+async function fetchOHLCVContinuously (exchange, symbol) {
+    while (true) {
+        try {
+            const ohlcv = await exchange.fetchOHLCV (symbol);
+            const ohlcvLength = ohlcv.length;
+            console.log ('Fetched ', exchange.id, ' - ', symbol, ' candles. last candle: ', ohlcv[ohlcvLength - 1]);
+        } catch (e) {
+            console.log (e);
+            break;
+        }
+    }
+}
+
+// start exchanges and fetch OHLCV loop
+async function startExchange (exchangeName, symbols) {
+    const ex = new ccxt[exchangeName] ({});
+    const promises = [];
+    for (let i = 0; i < symbols.length; i++) {
+        const symbol = symbols[i];
+        promises.push (fetchOHLCVContinuously (ex, symbol));
+    }
+    await Promise.all (promises);
+    await ex.close ();
+}
+
+// main function
+async function example () {
+    const exchanges = [ 'binance', 'okx', 'kraken' ];
+    const symbols = [ 'BTC/USDT', 'ETH/USDT' ];
+    const promises = [];
+    for (let i = 0; i < exchanges.length; i++) {
+        const exchangeName = exchanges[i];
+        promises.push (startExchange (exchangeName, symbols));
+    }
+    await Promise.all (promises);
+}
+
+
+await example ();
+ 
+```