For closing out orders in IB the best way I found was to go into Option Trader, then go to the combo tab...click on clear chains, then click on load my chains. TWS will then load only the chains that you have positions in. You're basically doing a buy/sell to close from there on (the opposite of what you did to open the position). I would recommend setting up your profit targets and putting in a limit order before hand (best down immediately after placing your order to open). You can always go to the orders tab, and easily modify and update the order from there, to reflect updated market conditions. You don't want to be doing this from scratch in a fast moving market.