Anyways this is my first post, but I have been trading for 3 years now. My questions: Isn't kind of obsolete using just regular level 2 quotes if you don't have access to the ARCA Web Book and the INET soon to be Nasdaq/Brut/INET book as well? I mean my current level 2 just shows the best/ask for arca, brut, etc. Also isn't pointless looking at the size of the bid and offers if you can hide most of your order. If you see arca offering 100 shares at x price but really has 10,000 shares. Doesn't that defeat the purpose of transperency?