NDX100: 50 x 200 Day SMAs Cross Negatively....

NDX100 Daily Close @ 12/13/12

Indecisive Chart patterns witnessed Wednesday (12/12/12) heralded the immediate  Short- Term corrective price action lower (See NYSE post below).
The NDX100 has closed below the Negatively Crossing 50/200day SMA's; a noteworthy & bearish signal.
A Weekly Close below (2670) would go a long way to signalling a more substantial correction could well be in order.