I am moving my account from OX to IB. TWS is a very complex platform & I have been watching webinars etc etc & am now getting a feel for the platform. I watched a webinar on order types, 50 off types however they did not cover off what I was looking for. Basically how do you place a sell to close order on an option contract, IB dont list this type of order anywhere. My concern is if I just sell a contract I could be writing the contract?