add example, make sure to raise error on unsupported exchanges and/or trading mode

freqtrade/exchange/binance.py

@@ -41,6 +41,7 @@ class Binance(Exchange):
         "fetch_orders_limit_minutes": None,
         "l2_limit_range": [5, 10, 20, 50, 100, 500, 1000],
         "ws_enabled": True,
+        "has_delisting": True,
     }
     _ft_has_futures: FtHas = {
         "funding_fee_candle_limit": 1000,

freqtrade/exchange/exchange.py

@@ -166,6 +166,7 @@ class Exchange:
         "proxy_coin_mapping": {},  # Mapping for proxy coins
         # Expected to be in the format {"fetchOHLCV": True} or {"fetchOHLCV": False}
         "ws_enabled": False,  # Set to true for exchanges with tested websocket support
+        "has_delisting": False,  # Set to true for exchanges that have delisting pair checks
     }
     _ft_has: FtHas = {}
     _ft_has_futures: FtHas = {}

freqtrade/exchange/exchange_types.py

@@ -63,6 +63,9 @@ class FtHas(TypedDict, total=False):
     # Websocket control
     ws_enabled: bool
 
+    # Delisting check
+    has_delisting: bool
+
 
 class Ticker(TypedDict):
     symbol: str

freqtrade/plugins/pairlist/DelistFilter.py

@@ -5,7 +5,7 @@ Delist pair list filter
 import logging
 from datetime import UTC, datetime, timedelta
 
-from freqtrade.exceptions import OperationalException
+from freqtrade.exceptions import ConfigurationError
 from freqtrade.exchange.exchange_types import Ticker
 from freqtrade.plugins.pairlist.IPairList import IPairList, PairlistParameter, SupportsBacktesting
 
@@ -21,8 +21,11 @@ class DelistFilter(IPairList):
 
         self._max_days_from_now = self._pairlistconfig.get("max_days_from_now", 0)
         if self._max_days_from_now < 0:
-            raise OperationalException("DelistFilter requires max_days_from_now to be >= 0")
-        self._enabled = self._max_days_from_now >= 0
+            raise ConfigurationError("DelistFilter requires max_days_from_now to be >= 0")
+        if not self._exchange._ft_has["has_delisting"]:
+            raise ConfigurationError(
+                "DelistFilter doesn't support this exchange and trading mode combination.",
+            )
 
     @property
     def needstickers(self) -> bool:
@@ -49,7 +52,7 @@ class DelistFilter(IPairList):
 
     @staticmethod
     def description() -> str:
-        return "Filter pairs that will bbe delisted on exchange."
+        return "Filter pairs that will be delisted on exchange."
 
     @staticmethod
     def available_parameters() -> dict[str, PairlistParameter]: