NASDAQ TotalView offers book depth for NASDAQ market participants. TotalView is an add-on service that provides you with all quotes and orders at every price level. Once subscribed you can access TotalView via the Market Depth window. Click New, Market Depth and select TotalView from the dropdown menu next to the Symbol field. The price levels are color coded and can be edited via the Properties menu (right-click, select Properties, Levels).
To learn more about NASDAQ TotalView, click here to visit the NASDAQ Exchange website.