Methodology and editorial policy

How Zlotex collects prices, matches markets and writes guides.

Price data

Every 10 minutes we read public market data from Polymarket's Gamma API and Kalshi's public API. Prices are mid points of the best bid and ask; for wide Kalshi books we use the last trade. We store one observation per matched outcome per hour. We do not place trades and receive no data feed from either exchange.

Matching identical events

Events are matched by normalized title similarity, then outcomes are matched within each event. Range markets (temperature, margin of victory, price brackets) are excluded because exchanges define ranges differently. Pairs whose prices differ by more than 20¢ are discarded as likely mismatches. Matching is automated and can still pair contracts with slightly different resolution rules; always read each exchange's rules.

State availability

State tables are compiled from exchange help centers, court records and regulator releases, each with a verification date. Rules change quickly; pages older than 45 days show a warning.

Guides

Guides are researched from primary sources (fee schedules, regulatory filings, court dockets, academic papers), listed at the end of each guide with a last-verified date. We correct errors when we find them.

Independence and money

Zlotex is independent. Some outbound links are affiliate links; partners never see or influence prices, rankings or editorial content. We never hold user funds and do not sell picks or signals.

Contact

Corrections: hello@zlotex.com.