NQ opened below key support level, 10,220, on Thursday which then triggered selling which then forced trapped buyers into selling as well which cause sharp decline all morning..
Selling continued all morning until the afternoon session as sellers took profit which cause a bit of a rally into the close.
On Friday, NQ may try to continue to rally in the morning but if key resistance is now at 11,220, is not clearly broken to the upside, buyers will come back in and could tank the market again on Friday.