This happens once a while. not very as freqently as before. This may signal mid term reversal. Every time when this happens, I am just curious how they coordinate so well and be strong to take out anything in their way. It is very difficult for non-floor traders to predict the magnitude of such move at the begining. You probably just realize it when it moves 1/3-1/2 of its course. But it also could not be such a move. How does your day trading strategy cope with this kind of situations? What do you think about it?