Move "tickers_needed" check to pairlistmanager to cover all pairlists

freqtrade/plugins/pairlist/SpreadFilter.py

@@ -5,7 +5,6 @@ import logging
 from typing import Any, Dict, Optional
 
 from freqtrade.constants import Config
-from freqtrade.exceptions import OperationalException
 from freqtrade.exchange.types import Ticker
 from freqtrade.plugins.pairlist.IPairList import IPairList
 
@@ -23,12 +22,6 @@ class SpreadFilter(IPairList):
         self._max_spread_ratio = pairlistconfig.get('max_spread_ratio', 0.005)
         self._enabled = self._max_spread_ratio != 0
 
-        if not self._exchange.exchange_has('fetchTickers'):
-            raise OperationalException(
-                'Exchange does not support fetchTickers, therefore SpreadFilter cannot be used.'
-                'Please edit your config and restart the bot.'
-            )
-
     @property
     def needstickers(self) -> bool:
         """

freqtrade/plugins/pairlistmanager.py

@@ -46,6 +46,15 @@ class PairListManager(LoggingMixin):
         if not self._pairlist_handlers:
             raise OperationalException("No Pairlist Handlers defined")
 
+        if self._tickers_needed and not self._exchange.exchange_has('fetchTickers'):
+            invalid = ". ".join([p.name for p in self._pairlist_handlers if p.needstickers])
+
+            raise OperationalException(
+                "Exchange does not support fetchTickers, therefore the following pairlists "
+                "cannot be used. Please edit your config and restart the bot.\n"
+                f"{invalid}."
+            )
+
         refresh_period = config.get('pairlist_refresh_period', 3600)
         LoggingMixin.__init__(self, logger, refresh_period)