Add pickle import

freqtrade/optimize/backtesting.py

@@ -8,6 +8,7 @@ from collections import defaultdict
 from copy import deepcopy
 from datetime import datetime, timedelta, timezone
 from typing import Any, Dict, List, Optional, Tuple
+import pickle
 
 from numpy import nan
 from pandas import DataFrame

freqtrade/optimize/optimize_reports.py

@@ -3,6 +3,7 @@ from copy import deepcopy
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 from typing import Any, Dict, List, Union
+import pickle
 
 from numpy import int64
 from pandas import DataFrame, to_datetime