What this tool is: strip the book's juice out of any two-sided market and see the fair odds, the true probabilities, and exactly how much hold the book is charging you. The first math of every +EV workflow.
Both sides of a market imply probabilities that add to more than 100% — the overage is the vig. Scaling them back to 100% (the multiplicative devig) reveals the fair line: what the bet is actually worth with the book's margin removed.
The fair line is your yardstick: any book paying better than fair is a positive EV bet. That comparison, automated across nine books and every market, is exactly what the Positive EV finder does all day. Size the resulting bet with the Kelly calculator, convert formats with the odds converter, and find the rest of the shelf in the Money Room.