Hi, All I have set an OCA group of "dgroup" at IB for allocating the order to 2 accounts bID = ibc.PlaceOrder( ticker, "Buy", entrysize, "MKT", 0, 0, "Day", true, TradeTickSize, "outsideRTH" , 0, "", 0, ";dgroup;;" ); When i trade at live account, the following problem occurs, How to solve this problem? Many Thanks, Regards, Ben For Reference Quoted from AmiBroker Auto-Trading interface for Interactive Brokers 1.3.8 Beta Read Me