Unless you finally opened a real money brokerage account recently, why would it matter to you? http://www.elitetrader.com/vb/showthread.php?s=&threadid=221311&perpage=30
The difference between your sell signal and your cover signal, assuming you do have some form of trading system..........
That was the precise top! QQQ now at the 63.30 area. In two days only, the gains of 30 days are gone.