I have a short position, set at 80K, and it went up all the way after that, so I moved all my positions into the margin. The margin saved my skin. Now I'm preparing to open another short position using the margin money. If I open another one and the previous margin is gone, will the earlier short position get liquidated? Should I set another one? If I set the previous one, it will get liquidated; if I don't set it, I won't earn a dime this time.