Quote from TraderStavros:
To further beat a dead horse I'd like to make sure my line of thinking is correct here. As someone who just begun some simulators on ThinkorSwim to start trading Futures in the near future I want to ensure that the transition from stocks to Futures is proper. It seems that the largest area of confusion around this is that with a stock you are buying the position spot and you (assuming no margin) must have the cash to pay for it up front. If you use margin for a stock you simply are just borrowing the difference. Your gain or loss is then determined by the resale value spot which is the difference between the cost and value. Very elementary but I wanted to spell it out before continuing.
With futures, provided my understanding is correct, you 'freeze' the margin requirement ($4500) for the time that you hold the contract. Your gain or loss is then determined by the number of ticks that occur before you close out the position. If you close with 2 ticks you get $100 (gross of commissions, assuming $50/tick) and your $4500 is 'unfrozen' plus your account is $100 heavier. If the position goes against you the portion 'unfrozen' is the margin ($4500) less the $100 (2 ticks).
Trade is complete and you are all in cash again.
Am I correct?