Improve wording, fix bug

freqtrade/mixins/logging_mixin.py

@@ -1,4 +1,5 @@
 from typing import Callable
+
 from cachetools import TTLCache, cached
 
 

freqtrade/optimize/backtesting.py

@@ -18,6 +18,7 @@ from freqtrade.data.converter import trim_dataframe
 from freqtrade.data.dataprovider import DataProvider
 from freqtrade.exceptions import OperationalException
 from freqtrade.exchange import timeframe_to_minutes, timeframe_to_seconds
+from freqtrade.mixins import LoggingMixin
 from freqtrade.optimize.optimize_reports import (generate_backtest_stats, show_backtest_results,
                                                  store_backtest_stats)
 from freqtrade.pairlist.pairlistmanager import PairListManager
@@ -25,7 +26,6 @@ from freqtrade.persistence import PairLocks, Trade
 from freqtrade.plugins.protectionmanager import ProtectionManager
 from freqtrade.resolvers import ExchangeResolver, StrategyResolver
 from freqtrade.strategy.interface import IStrategy, SellCheckTuple, SellType
-from freqtrade.mixins import LoggingMixin
 
 
 logger = logging.getLogger(__name__)

freqtrade/plugins/protections/max_drawdown_protection.py

@@ -54,7 +54,10 @@ class MaxDrawdown(IProtection):
             return False, None, None
 
         # Drawdown is always positive
-        drawdown, _, _ = calculate_max_drawdown(trades_df, value_col='close_profit')
+        try:
+            drawdown, _, _ = calculate_max_drawdown(trades_df, value_col='close_profit')
+        except ValueError:
+            return False, None, None
 
         if drawdown > self._max_allowed_drawdown:
             self.log_once(