Perhaps someone can help me in automated trading. If something went wrong, (e.g. a One Cancels Other order did not cancel a leg on time and both orders went thru & caused a Regulation T problem), is it sufficient that the extra position is liquidated before the end of day, or will the account be frozen as well till enough funds are deposited? B) If it was the broker's fault if the guideline is different? Appreciated in advance.