diff --git a/freqtrade/strategy/interface.py b/freqtrade/strategy/interface.py
index 1c9a18b5c..5cdbb6bf6 100644
--- a/freqtrade/strategy/interface.py
+++ b/freqtrade/strategy/interface.py
@@ -406,7 +406,7 @@ class IStrategy(ABC, HyperStrategyMixin):
         When not implemented by a strategy, returns None, orderbook is used to set entry price
 
         :param pair: Pair that's currently analyzed
-        :param trade: trade object.
+        :param trade: trade object (None for initial entries).
         :param current_time: datetime object, containing the current datetime
         :param proposed_rate: Rate, calculated based on pricing settings in exit_pricing.
         :param entry_tag: Optional entry_tag (buy_tag) if provided with the buy signal.