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docs/ccxt/wiki/examples/js/live-tickers.md

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+- [Live Tickers](./examples/js/)
+
+
+ ```javascript
+ 
+
+import asTable from 'as-table';
+import ololog from 'ololog';
+import ansicolor from 'ansicolor';
+import ccxt from '../../js/ccxt.js';
+
+ansicolor.nice
+
+const { noLocate } = ololog;
+const log = noLocate;
+
+let printSupportedExchanges = function () {
+    log ('Supported exchanges:', ccxt.exchanges.join (', ').green)
+}
+
+let printUsage = function () {
+    log ('Usage: node', process.argv[1], 'exchange'.green)
+    printSupportedExchanges ()
+}
+
+let printTickers = async (id) => {
+
+    // check if the exchange is supported by ccxt
+    let exchangeFound = ccxt.exchanges.indexOf (id) > -1
+    if (exchangeFound) {
+
+        log ('Instantiating', id.green, 'exchange')
+
+        // instantiate the exchange by id
+        let exchange = new ccxt[id] ()
+
+        // load all markets from the exchange
+        let markets = await exchange.loadMarkets ()
+
+        while (true) {
+
+            const tickers = await exchange.fetchTickers ()
+
+            log ('--------------------------------------------------------')
+            log (exchange.id.green, exchange.iso8601 (exchange.milliseconds ()))
+            log ('Fetched', Object.values (tickers).length.toString ().green, 'tickers:')
+            log (asTable.configure ({ delimiter: ' | '.dim, right: true }) (
+                ccxt.sortBy (Object.values (tickers), 'quoteVolume', true)
+                                   .slice (0,20)
+                                   .map (ticker => ({
+                                        symbol: ticker['symbol'],
+                                        price: ticker['last'].toFixed (8),
+                                        datetime: ticker['datetime'],
+                                   }))))
+        }
+
+    } else {
+
+        log ('Exchange ' + id.red + ' not found')
+        printSupportedExchanges ()
+    }
+}
+
+;(async function main () {
+
+    if (process.argv.length > 2) {
+
+        const id = process.argv[2]
+        await printTickers (id)
+
+    } else {
+
+        printUsage ()
+    }
+
+    process.exit ()
+
+}) () 
+```