Quote from autotrader:
that happens if an entry does not have a matching exit, such as you entered a position in AutoTrader, but closed the position in TWS, hence the profit is only showing half the side of the transaction.
another possible cause is for that symbol that had the wrong value, the multiplier data was not set properly. you can go to the preferences window, and go to each contract, click the details button (you need to be connected to TWS), then click the save button. This will refresh the multuplier value for each contract.
autotrader
