The archive holds closing prices for the match winner on professional matches from 2016, each linked to its match. It is the one market collected for darts.
Margin taken out
Where an endpoint gives an implied probability, the bookmaker's margin has been removed, so the two players' chances add up to one.
What is measured
/v1/markets/calibration: implied chance against what actually happened, band by band./v1/markets/favourites: how often favourites win, by price and format./v1/markets/upsets: the longest-priced winners./v1/markets/formats: how match length changes the picture./v1/prices/bulk: every priced match, for building your own model.