Here's a great lesson to learn. Look at a 1 min chart and notice the huge gap down around 15:25. That gap, or part of it will usually fill which I was expecting, but not to the extreme and quickness that it did. One obvious point that slipped my mind was as the market nearined the close, portfolio managers will send huge buy side order flow to inflate the closing price of their large holdings so they have a more favorable report at quarters end. I can't believe, well acutally I can, how fast that stock gapped up. I refuse to sell into that manipulation by the specialists. Now that the market is closed you can see how quickly the price dropped back.