For the ad buy side; I made a live data terminal app for tracking the order book, purchased block burndown, and bid pricing calc against volume-weighted average price of the order book.
Tracks which ads are actually getting served and what to bid to not overpay or get buried.
943.1 imps/min
Top bid now | $111.00
Serving floor | $31.00
Open interest | $1,506
Imps in book | 38.6K
https://www.insapio.com/