I get L2 from my TD Ameritrade account. I don't find it of much use. The MMs still like to show 5000 all the time. You really don't know how many shares are at the bid or ask these days. I used to have this 8 ball that I could shake and it would answer all my questions. Was a lot more reliable than L2 for pennies LoL
Some online brokers will give you access to a lot of different tools for free if you have an active account with them. I particularly like the tool set provided by TD Ameritrade, which is why I use them as my online broker. They are not the cheapest around but they are not much more expensive than the cheapest and they give you a lot of gadgets and services. Below is a picture of how I have one of their older tools (strategy desk) set up as an information screen. The level II streaming bid and ask are as good as anyone's (not very complete or accurate, but usable for some insight) The time and sales streamer below the bid/ask is more complete. Mike L.