Say if I'm trying to submit following order. DXD JAN 30 CALL -- BUY 1.15 DXD JAN 30 CALL -- SELL 1.45 I want to submit both side of orders and relax but IB has problem with it. Since I already have a pending buy side order on same contract they won't accept your sell order. Bad - Isn't it? How do other brokers do in similar situations.