The same outcome, priced by everyone, on one row.
Sportsbooks quote in American odds, prediction markets quote in probability. PredictHQ normalizes both to decimal, lines them up per outcome, and rings whoever is paying the most.
When the books disagree enough, both sides win
Add up the implied probability of the best available price on every outcome. Below 100 percent, the field has mispriced the market against itself and a split stake returns a profit whichever way it lands.
No arbitrage on the board right now.
This is the normal state. Books converge quickly, and a page that always has one to show you is showing you a fabricated one.
Three notations, one number
Every price is available as decimal, American, and implied percentage, switchable on the board. They are the same quantity written three ways, and being able to flip between them is what makes a sportsbook line and a prediction-market probability actually comparable.
Hold is the number that matters
A single book's implied probabilities sum above 100 percent, and the excess is its margin. Combining the best price from every venue shrinks that margin, and the board shows what is left after shopping rather than what any one book advertises.
Open the board
Every game, every book, live. Tap a best price to start a sheet.