Fix hitbtc2 ohlcv
diff --git a/js/hitbtc2.js b/js/hitbtc2.js
index 1c38a1821d56..1a8cb8befe67 100644
--- a/js/hitbtc2.js
+++ b/js/hitbtc2.js
@@ -690,7 +690,7 @@ module.exports = class hitbtc2 extends hitbtc {
             parseFloat (ohlcv['max']),
             parseFloat (ohlcv['min']),
             parseFloat (ohlcv['close']),
-            parseFloat (ohlcv['volumeQuote']),
+            parseFloat (ohlcv['volume']),
         ];
     }
 

Hitbtc2 ohlcv api returns volume information different than others. Usually quote volume means the volume of the currency itself, whereas base volume means the volume of currency in base currency such as BTC.

For hitbtc2, however ([example](https://api.hitbtc.com/api/2/public/candles/EMCBTC?limit=100&period=D1))
   - volume => quote volume
   - volumeQuote => base volume

So, i've made the neccesary change to make it consistent with other exchanges.