fix: ffill backtest

auto_trading/broker/backtest.py

@@ -10,7 +10,7 @@ class Backtest(Broker):
     
     def __init__(self, f_name: str, start=0, **kwargs) -> None:
         """Read the csv file and store it into a dataframe"""
-        self.data = pd.read_csv(f_name, **kwargs)
+        self.data = pd.read_csv(f_name, **kwargs).fillna(method="ffill")
         self.curcor = start
     
     def __bool__(self):