Quote from Maverick74:
Open book is garbage. Look, at my peak and my firm's peak, the orders on our floor alone were 90% of the open book. Those were all OUR orders! We pulled those orders as soon as a certain bid was hit. We had no interest in buying the stock.
Now, another thing. Orders in the open book that were not ours were stale orders. In other words, they were the same as that 10k bid you see at the figure that doesn't go anywhere. That bid is not an aggressive buyer. He is not going to push the stock up. Whether you are try to take a dollar out of the stock or 2 cents, doesn't matter, he isn't going anywhere!
In order to scalp profitably or catch a big move, you need to get in front of real bids, aggressive bids. Not stale bids! Institutions never post orders on open book. That's what the specialist is for! This is the difference between nasdaq and listed stocks. The specialist is going to work any large order for an institution, and he will never show that size, ever!
As for the other question about tape reading still being viable. I believe it is not. Or let me put it this way, there is not enough reward in it now to justify doing it. Anything can be profitable, but you have to ask yourself is it worth the risk, the stress, the effort for the reward? The ECN's and all the autobots are putting too much noise on the tape.
I think if there are any stocks left you can truly read the tape on, it would be the most illiquid, low volume stocks out there. Look for stocks that do 50k to 300k shares a day. I know some of you are saying what! LOL. I use to trade these stocks 5 years ago although most of my stocks were in the 500k to 1 million share a day range. My reason for going after these low volume stocks is no one is trading them! There are no stock baskets they are in probably, no ETF's at least not heavily arbitraged ETF's. They are not sexy, so you won't have anyone from ET in them. All you have is you and the institutional buyers and sellers.
Now let me caution you, to trade these stocks, you need to be able to read the tape very well because you don't have all those other traders to lean on when you miss a bid or an offer and it can be painful I assure you. But that is the last bastion of tape reading left. Good luck!