What happens when a system uses margin but the account does not support that?
C2 AutoTrading does not know whether your brokerage account can use margin or not. It simply relies on your sizing instructions when placing trades. Therefore, if you subscribe to a C2 system which uses margin (and by definition all C2 stock/etf trading systems do) but your real-life brokerage account does not support margin, you’ll want to factor this into your sizing preferences (i.e. probably by cutting your trade sizes by 2).