We have no control over your broker account and how it is set up regarding margin.
We simply send trades to your account. If there is margin available, and your broker allows margin use to open a position, then margin will be used and the position will be opened. If not, then the order will be rejected. (And our AutoTrade software will report to you the problem.)
So in other words: you can set up your broker account(s) however you like directly with your broker; but it's not something C2 has any visibility into, or control over.