Never try to trade with loan money even if it is without interest. why
Suppose you trade with balance of 3000$, you keep 50% of your balance at risk i.e. 1500$ then to succeed in long run you should have multiple instances of that 1500$. Because i admit you will make profit but in the hour of need you must have back up to recover your loss. and if you have borrowed money for your capital, you do not have any back up plus you have to return your capital whether you win or loose