Quote from FastandFurious:
see that's the difference. For the scalper, the openbook and level II is very useful where as the level I is not so much. If there's a market short by an institutional order, I can see what price level he is at. When the ECNs on level II walks to the other side, it warns me that the size may be printed all in one shot now, and look to get out. But that's scalping where I can about 1 minute or 2 that I'm in the market where you are in the market all day.
banded prints are prints that are not in the currently new york spread.