Call custom_exit_price only for sell_signal and custom_sell

docs/bot-basics.md

@@ -59,7 +59,7 @@ This loop will be repeated again and again until the bot is stopped.
   * Call `custom_entry_price()` (if implemented in the strategy) to determine entry price (Prices are moved to be within the opening candle).
   * Determine stake size by calling the `custom_stake_amount()` callback.
   * Call `custom_stoploss()` and `custom_sell()` to find custom exit points.
-  * Call `custom_exit_price()` to determine exit price (Prices are moved to be within the closing candle).
+  * For sells based on sell-signal and custom-sell: Call `custom_exit_price()` to determine exit price (Prices are moved to be within the closing candle).
 
 * Generate backtest report output
 

docs/strategy-callbacks.md

@@ -390,6 +390,7 @@ class AwesomeStrategy(IStrategy):
 !!! Warning "Backtesting"
     While Custom prices are supported in backtesting (starting with 2021.12), prices will be moved to within the candle's high/low prices.
     This behavior is currently being tested, and might be changed at a later point.
+    `custom_exit_price()` is only called for sells of type Sell_signal and Custom sell. All other sell-types will use regular backtesting prices.
 
 ## Custom order timeout rules
 

freqtrade/optimize/backtesting.py

@@ -365,11 +365,13 @@ class Backtesting:
             closerate = self._get_close_rate(sell_row, trade, sell, trade_dur)
             # call the custom exit price,with default value as previous closerate
             current_profit = trade.calc_profit_ratio(closerate)
-            closerate = strategy_safe_wrapper(self.strategy.custom_exit_price,
-                                              default_retval=closerate)(
-                pair=trade.pair, trade=trade,
-                current_time=sell_row[DATE_IDX],
-                proposed_rate=closerate, current_profit=current_profit)
+            if sell.sell_type in (SellType.SELL_SIGNAL, SellType.CUSTOM_SELL):
+                # Custom exit pricing only for sell-signals
+                closerate = strategy_safe_wrapper(self.strategy.custom_exit_price,
+                                                  default_retval=closerate)(
+                    pair=trade.pair, trade=trade,
+                    current_time=sell_row[DATE_IDX],
+                    proposed_rate=closerate, current_profit=current_profit)
             # Use the maximum between close_rate and low as we cannot sell outside of a candle.
             # Applies when a new ROI setting comes in place and the whole candle is above that.
             closerate = min(max(closerate, sell_row[LOW_IDX]), sell_row[HIGH_IDX])