Share your insights or perspective on the financial matter presented in the input.

Where to find the full book of outstanding bids/asks for a stock?
For starters, that site shows the first 5 levels on each side of the book, which is actually quite a bit of information.  When traders say the top of the book, they mean just the first level.  So you're already getting 8 extra levels. If you want all the details, you must subscribe to the exchange's data feeds (this costs thousands of dollars per month) or open an account with a broker who offers that information. More important than depth, however, is update frequency.  The BATS site appears to update every 5 seconds, which is nowhere near frequently enough to see what's truly going on in the book.  Depending on your use case, 2 levels on each side of the book updated every millisecond might be far more valuable than 20 levels on each side updated every second.