can u trade index futures[ es, ym er2] without a margin account. can u trade more than one round trip a day without the pattern day trader halt of your account? can u trade agriculture futures with just a cash account? side note, what if u traded 3 round trip trades in a day with a cash account and entered a fourth that you had to close. would u be stuck with that trade until the next day, or would your account be froze and your stuck with it longer?