Test for wrong inputs (empty / none-dataframes) in get_signal

2018-12-12 19:35:51 +01:00
parent d6ba4f0e81
commit 5c3dcf3e2b
2 changed files with 6 additions and 1 deletions
--- a/freqtrade/strategy/interface.py
+++ b/freqtrade/strategy/interface.py
@@ -161,7 +161,7 @@ class IStrategy(ABC):
        :param dataframe: Dataframe to analyze
        :return: (Buy, Sell) A bool-tuple indicating buy/sell signal
        """
-        if isinstance(dataframe, DataFrame) and dataframe.empty:
+        if not isinstance(dataframe, DataFrame) or dataframe.empty:
            logger.warning('Empty ticker history for pair %s', pair)
            return False, False