Initialise inverted variable in currency conversion

core/lib/market.py

@@ -52,6 +52,8 @@ def to_currency(direction, account, amount, from_currency, to_currency):
     :param to_currency: Currency to convert to
     :return: Converted amount
     """
+    inverted = False
+
     # This is needed because OANDA has different values for bid and ask
     if direction == "buy":
         price_index = "bids"