Manic Investors

Who are these people that buy on rallys and sell on dips?  Unfortunately they seem to be everywhere.

Update at 1:30 CST:

From a short term technical standpoint the S&P Index is attempting to put in short term base for an end of year rally.  The area that traders are trying to defend is the 1990 to 2080 price range.  A close over 2080 should help a rally attempt, a close below 1990 will signal a major break is coming.  We are not going to trade for the rally.