Here's something I've been watching and it seems to work greater then 90% of the time!... yes, greater then 90% of the time so far this year by my estimations. The fact of the matter is that the Q's & the Nasdaq Composite lead the markets either up or down for the most part. Today, what is happening is the Dow + S&P 500 are outperforming the Nasdaq Composite & Q's, this is something that bears like to see and that bulls frown at. No rally will be sustained by such leadership...
If this continues into the close, then I would consider the Q's and Composite's performance as bearish divergences and the 90% factor comes in as tomorrow likely being a down day for the broader markets...
Currently: Dow +.55% S&P +.49% Nas +.31% Q's +.17%