add max_buy_position_adjustment as attribute

freqtrade/strategy/interface.py

@@ -108,6 +108,7 @@ class IStrategy(ABC, HyperStrategyMixin):
 
     # Position adjustment is disabled by default
     position_adjustment_enable: bool = False
+    max_buy_position_adjustment: int = 1
 
     # Number of seconds after which the candle will no longer result in a buy on expired candles
     ignore_buying_expired_candle_after: int = 0