Polymarket and Kalshi use mathematically equivalent but linguistically different threshold definitions for spread markets. Polymarket states outcomes as binary (team wins by X or more, else opponent), while Kalshi uses explicit "more than" phrasing. Both resolve identically on actual scorelines but differ in edge-case language around postponements and cancellations.
Hero Tip:
For spread markets, both platforms will produce identical YES/NO outcomes on any completed match. The real risk is postponement or cancellation: Polymarket explicitly states 50-50 resolution if canceled with no makeup; Kalshi does not address cancellation in the provided rules. Confirm game completion and obtain official final score from slstat.com within 2 hours. If official stats are unavailable, credible reporting consensus is the fallback on both platforms.
Critical Divergence Points:
Polymarket: Spread markets (e.g., Al Nassr -1.5) resolve YES if the named team wins by the stated margin or more; otherwise resolve to the opposing team. Explicitly states 50-50 resolution if game is canceled with no makeup. Primary source is slstat.com; secondary source is credible reporting consensus if official stats not published within 2 hours.
Kalshi: Spread markets (e.g., Al Nassr wins by more than 1.5 goals) resolve YES if the named team wins by strictly more than the stated margin (i.e., 2+ goals for -1.5). Does not explicitly address cancellation or postponement protocols. No secondary resolution source specified.
Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.
Follow the signals, not the noise
Get insights on market conviction, notable shifts, and what the data is quietly signaling.