diff --git a/freqtrade/freqtradebot.py b/freqtrade/freqtradebot.py
index b3ff4923d..5a33e9fa6 100644
--- a/freqtrade/freqtradebot.py
+++ b/freqtrade/freqtradebot.py
@@ -2370,6 +2370,18 @@ class FreqtradeBot(LoggingMixin):
             trade, order, order_obj, order_amount, order.get("trades", [])
         )
 
+    def _trades_valid_for_fee(self, trades: List[Dict[str, Any]]) -> bool:
+        """
+        Check if trades are valid for fee detection.
+        :return: True if trades are valid for fee detection, False otherwise
+        """
+        if not trades:
+            return False
+        # We expect amount and cost to be present in all trade objects.
+        if any(trade.get("amount") is None or trade.get("cost") is None for trade in trades):
+            return False
+        return True
+
     def fee_detection_from_trades(
         self, trade: Trade, order: Dict, order_obj: Order, order_amount: float, trades: List
     ) -> Optional[float]:
@@ -2377,7 +2389,7 @@ class FreqtradeBot(LoggingMixin):
         fee-detection fallback to Trades.
         Either uses provided trades list or the result of fetch_my_trades to get correct fee.
         """
-        if not trades:
+        if not self._trades_valid_for_fee(trades):
             trades = self.exchange.get_trades_for_order(
                 self.exchange.get_order_id_conditional(order), trade.pair, order_obj.order_date
             )