PROVISUM

Prediction markets price the same events differently, minute to minute. PROVISUM crawls Polymarket, Kalshi, PredictIt and Limitless continuously, matches markets that resolve on identical terms, prices both legs net of each venue's fees, and walks the real order book to show how much size actually fills. A correctly matched pair is not a directional bet: exactly one leg pays out whichever way the event resolves. The engineering effort goes mostly into the opposite of finding spreads - throwing out pairs that only look alike. Every settled position is published on a public results page, including the ones that failed.