I hate the way Scottrade does that. I bought with them at 9:35 no problem. They probably cut if off because of the volume flow. I guess they must be short when they do that. Scottrade ususally goes through NITE.
OT: Scottrade blocked me from 4 buys over a week that all went up, I just didn't bother to call it in. EVSA was one that comes to mind in that time. I had to call in to buy BHUB and LSMJ 2 weeks ago - at a higher pps cause of the delay. So, when CYPO jumped last week I was blocked and called in, paid 50% higher pps cause of the phone in delay. I wouldn't of bought that day at that pps but I was so ticked off I raised by bid just to assure a fill.
Point: Just call them the second you find out your blocked, it's probably going up.