Added range checks to min_days_listed in AgeFilter

freqtrade/exchange/exchange.py

@@ -187,6 +187,11 @@ class Exchange:
     def timeframes(self) -> List[str]:
         return list((self._api.timeframes or {}).keys())
 
+    @property
+    def ohlcv_candle_limit(self) -> int:
+        """exchange ohlcv candle limit"""
+        return int(self._ohlcv_candle_limit)
+
     @property
     def markets(self) -> Dict:
         """exchange ccxt markets"""