Starter checklist

Before you open a prediction-market account, check these five things.

ProbabilityWatch is an independent education site. Use this page to understand the basics first: implied probability, market rules, fees, liquidity and jurisdiction availability.

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Five checks before leaving this site

1

Price means probability, not certainty

A YES share near 42¢ roughly implies a 42% market probability before fees and spread. Compare it with your own estimate.

Open calculator →
2

Read resolution rules

Every market has criteria that determine the final outcome. Ambiguous wording can matter more than the headline.

Resolution guide →
3

Check spread and liquidity

Thin markets can look attractive but be hard to enter or exit at the displayed price.

Liquidity guide →
4

Understand fees and availability

Fees, access and rules vary by location and platform. Check official terms before taking action.

Fees guide →