FAQ
Common questions about PredictMarkets and how it works.
What is PredictMarkets?
PredictMarkets aggregates Premier League prediction markets from Polymarket and Kalshi into a single dashboard. You can compare odds across platforms, spot arbitrage opportunities, and track how prices move over time.
What are prediction markets?
Prediction markets let you buy and sell contracts on the outcome of real-world events. For football, you can trade on match winners, over/under goals, spreads, and more. Prices reflect the crowd's probability estimate for each outcome.
Where does the data come from?
All market data is fetched directly from the public APIs of Polymarket and Kalshi. We don't store personal data or require sign-up. Match fixtures are cross-referenced with Premier League scheduling data.
What does the price divergence percentage mean?
When the same match is priced differently on Polymarket and Kalshi, we highlight spreads above 5%. This shows where the platforms disagree most — but a price difference isn't necessarily an executable arbitrage. Visit the Arbitrage page for fee-adjusted analysis with actual bid/ask prices.
How often is the data updated?
Market data is refreshed from the APIs on each page load, with server-side caching to keep things fast. Price history snapshots are taken periodically and stored for historical charts. WebSocket live streaming is available for real-time Polymarket prices.
Is this financial advice?
No. PredictMarkets is an informational tool that displays publicly available market data. We don't provide financial advice or recommendations. Prediction markets may not be legal in all jurisdictions — check your local regulations.
Can I place bets through this site?
No. PredictMarkets is a data aggregator only. To trade, you'll need accounts on Polymarket and/or Kalshi directly. We link to the relevant platforms where possible.
What leagues are supported?
Currently we focus exclusively on the English Premier League. We may expand to other leagues (Champions League, La Liga, Bundesliga) in the future.
Is the code open source?
Yes! The full source code is available on GitHub at github.com/meharpalbasi/prediction_markets_football.