Some more compatibility fixes.

freqtrade/freqtradebot.py

@@ -598,7 +598,7 @@ class FreqtradeBot(LoggingMixin):
 
         # Fee is applied twice because we make a LIMIT_BUY and LIMIT_SELL
         fee = self.exchange.get_fee(symbol=pair, taker_or_maker='maker')
-        if not pos_adjust:
+        if trade is None:
             trade = Trade(
                 pair=pair,
                 stake_amount=stake_amount,
@@ -616,6 +616,7 @@ class FreqtradeBot(LoggingMixin):
                 buy_tag=buy_tag,
                 timeframe=timeframe_to_minutes(self.config['timeframe'])
             )
+
         trade.fee_open_currency = None
         trade.fee_open_currency = order_id
         trade.orders.append(order_obj)

freqtrade/optimize/backtesting.py

@@ -24,7 +24,7 @@ from freqtrade.mixins import LoggingMixin
 from freqtrade.optimize.bt_progress import BTProgress
 from freqtrade.optimize.optimize_reports import (generate_backtest_stats, show_backtest_results,
                                                  store_backtest_stats)
-from freqtrade.persistence import LocalTrade, PairLocks, Trade, Order
+from freqtrade.persistence import LocalTrade, Order, PairLocks, Trade
 from freqtrade.plugins.pairlistmanager import PairListManager
 from freqtrade.plugins.protectionmanager import ProtectionManager
 from freqtrade.resolvers import ExchangeResolver, StrategyResolver
@@ -352,7 +352,7 @@ class Backtesting:
             return sell_row[OPEN_IDX]
 
     def _get_adjust_trade_entry_for_candle(self, trade: LocalTrade, row: Tuple
-                                           ) -> Optional[LocalTrade]:
+                                           ) -> LocalTrade:
 
         current_profit = trade.calc_profit_ratio(row[OPEN_IDX])
 
@@ -368,7 +368,7 @@ class Backtesting:
         return trade
 
     def _execute_trade_position_change(self, trade: LocalTrade, row: Tuple,
-                                       stake_amount: float) -> Optional[LocalTrade]:
+                                       stake_amount: float) -> LocalTrade:
         current_price = row[OPEN_IDX]
         propose_rate = min(max(current_price, row[LOW_IDX]), row[HIGH_IDX])
         available_amount = self.wallets.get_available_stake_amount()

tests/optimize/test_backtesting_adjust_position.py

@@ -8,7 +8,7 @@ from freqtrade.data import history
 from freqtrade.data.history import get_timerange
 from freqtrade.enums import SellType
 from freqtrade.optimize.backtesting import Backtesting
-from tests.conftest import (patch_exchange)
+from tests.conftest import patch_exchange
 
 
 def test_backtest_position_adjustment(default_conf, fee, mocker, testdatadir) -> None:

tests/strategy/strats/strategy_test_v2.py

@@ -1,12 +1,13 @@
 # pragma pylint: disable=missing-docstring, invalid-name, pointless-string-statement
 
+from datetime import datetime
+
 import talib.abstract as ta
 from pandas import DataFrame
 
 import freqtrade.vendor.qtpylib.indicators as qtpylib
-from freqtrade.strategy.interface import IStrategy
 from freqtrade.persistence import Trade
-from datetime import datetime
+from freqtrade.strategy.interface import IStrategy
 
 
 class StrategyTestV2(IStrategy):