I am not too familiar with equity trading so maybe it doesn't work for that type of product but it works for futures. The problem is most people won't put in the time required to learn it. I spent the better part of a year just watching the tape and the DOM in replay. I have been trading live for the past few months and it has "clicked" for me.
I tried to use it with Nasdaq Stocks and Futures, too distracting entire day goes by, nice seeing your order get filled though LOL