Quote from Quiet1:
this is why you should ALWAYS use futures for non-day trades if your account warrants it. Your FX "broker" makes part of his money by charging you LIBOR+X% on your debit side and giving you LIBOR-X% on your credit side. Futures have flat LIBOR financing built-in (or near it anyways).
Q1
good point.. trading the futures is practically an arb against your broker padding the rates on each side. so you basically lose a little bit less.
only downside is position sizing issues for smaller accounts.