Quote from NasdaqTrader:
For listed stocks,there could be floor brokers or the specialist that keep bidding or offering the stock,but it won't be reflected in the size shown since they don't want to show their hand.The specialist might show a 100 share bid,but you might have a floor broker that has a million shares to buy,but doesn't want to show his hand since it might drive the price up.On nasdaq stocks,the real size also might not be known,since market makers and ecn's can disguise their true size with hidden and reserve orders.
Well, it makes sense. I'll try to incorporate that knowledge into my trading strategy today.
I feel pretty good today. I noticed yesterday that NT tanked and then went sideways while the markets were rallying. I think that NT would be a good short at the open if the indicies come in. Hopefully I'm right.