how can I add a contract on my current position without closing it?

[roxanarp800]

every time that I have an open position with one contract and 20 minutes later i want to add a contract either I don´t know how to do it or I don´t know but it close my current position and it doesn´t do anything. Can somebody help me please?

[William Roeder]

roxanarp800:  I don´t know how to do it

Yes you do. You already know how to open a position; open another one.