increment limit to adjust to FTX defaults (1500 candles)

freqtrade/exchange/ftx.py

@@ -0,0 +1,14 @@
+""" FTX exchange subclass """
+import logging
+from typing import Dict
+
+from freqtrade.exchange import Exchange
+
+logger = logging.getLogger(__name__)
+
+
+class Ftx(Exchange):
+
+    _ft_has: Dict = {
+        "ohlcv_candle_limit": 1500,
+    }