From 08636c6e78501e5cc9d85a30c0fe15a07000952f Mon Sep 17 00:00:00 2001
From: Adrien Wulfran <38992867+adwulfran@users.noreply.github.com>
Date: Fri, 17 Jul 2020 13:21:39 +0200
Subject: [PATCH] Update README.md

---
 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 32c6bc4..976df3c 100644
--- a/README.md
+++ b/README.md
@@ -13,12 +13,12 @@ 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)
 ```javascript
 const WebSocket = require('ws');
 const ws = new WebSocket("ws://realtimefinance.io, {
   headers: {
-    "api_key": "demo",
+    "API-X-KEY": "demo",
     "symbol" : "EURUSD,AAPL,MSFT,MC.PA"
   }
 });