http://www.321gold.com/editorials/mcclellan/mcclellan020620.html

here is a nice article,... does this mean we are close to a top? 

remember, stocks still went up for a couple years in the past even when earnings did not.  but for how long?  

in 2007 rail traffic had been declining for a few quarters, even while everyone said we were still growing.  

if you short the market too early,  you can lose alot of money by being right at the wrong time.