Update README.md

fix

Author: adwulfran

README.md

@@ -16,7 +16,7 @@ npm install ws
 
 ## Usage example
 
-Use stock symbol to receive datas. In this example we use EURUSD (forex), AAPL (apple - nasdaq), MSFT (microsoft - nasdaq) and MC.PA (lvmh - cac40)
+Use stock symbol to receive datas. In this example we use EURUSD (forex), GBPUSD (forex), AAPL (apple - nasdaq), MSFT (microsoft - nasdaq) and MC.PA (lvmh - cac40)
 ```javascript
 const WebSocket = require('ws');
 const ws = new WebSocket("wss://api.realtimefinance.io", {
@@ -25,7 +25,7 @@ const ws = new WebSocket("wss://api.realtimefinance.io", {
 
 const message = {
   event: "subscribe",
-  data: ['EURUSD','GBPUSD','AAPL','MSFT']
+  data: ['EURUSD','GBPUSD','AAPL','MSFT','MC.PA']
 };
 ws.on("open", function open() {
   ws.send(JSON.stringify(message));