Knowing football is one input. The price is another.

You can know the teams, read every injury update, and still pay too much for the right outcome.

That is the awkward part of sports markets. Picking the winner and finding a good price are different tests.

Convert the story into a number

Before opening the order screen, write your probability estimate and why it differs from the market. Separate confirmed lineup information from speculation. Note what would change your estimate.

In a simplified example, a 60% estimate against a 55-cent binary share implies five cents of expected value before costs. If your true forecasting skill supports only 53%, the attractive-looking trade is already negative.

Keep the event definition precise

Does the contract include extra time? What happens if the match is postponed? Which competition and fixture does it refer to? The team name is not a complete specification.

Make the same checks before comparing prices across markets. A full-time result and qualification for the next round are not the same outcome.

Review the process after the whistle

Record your pre-match estimate, entry, fees, and maximum planned stake. Review losses as carefully as wins. Increasing the next position to recover a loss changes the risk without improving the forecast.

The most useful match note is the one written before kickoff. After the result, a confident story is easy. A dated probability estimate is harder to fake.

Further reading: Prices and order books · Resolution rules · Current fees.

Explore the markets: Open Polymarket (referral link).