Just a quick question for TOS users. I want to enter two options spreads, but i want them to fill simultaneously. Is that what the blast feature is for? The way they described it in the flash demo it sounds like it just enters them simultaneously, but not necessarily fills them simultaneously. In other words i want to buy an iron condor and sell a straddle but i don't want to be left with one filled and not the other. can anyone help me figure this out?