feat: add coinex subclass

closes #12306

freqtrade/exchange/__init__.py

@@ -11,6 +11,7 @@ from freqtrade.exchange.bitmart import Bitmart
 from freqtrade.exchange.bitpanda import Bitpanda
 from freqtrade.exchange.bitvavo import Bitvavo
 from freqtrade.exchange.bybit import Bybit
+from freqtrade.exchange.coinex import Coinex
 from freqtrade.exchange.cryptocom import Cryptocom
 from freqtrade.exchange.exchange_utils import (
     ROUND_DOWN,

freqtrade/exchange/coinex.py

@@ -0,0 +1,24 @@
+import logging
+
+from freqtrade.exchange import Exchange
+from freqtrade.exchange.exchange_types import FtHas
+
+
+logger = logging.getLogger(__name__)
+
+
+class Coinex(Exchange):
+    """
+    CoinEx exchange class. Contains adjustments needed for Freqtrade to work
+    with this exchange.
+
+    Please note that this exchange is not included in the list of exchanges
+    officially supported by the Freqtrade development team. So some features
+    may still not work as expected.
+    """
+
+    _ft_has: FtHas = {
+        "l2_limit_range": [5, 10, 20, 50],
+        "tickers_have_bid_ask": False,
+        "tickers_have_quoteVolume": False,
+    }