Spread

The difference between the best buy (bid) and sell (ask) prices in an order book.

Tighter spreads mean lower trading costs. Highly liquid Polymarket markets typically have spreads under 2 cents.

See it in action

Will Joe Biden get Coronavirus before the election?

Yes 0¢Vol: $32.3k

Will Airbnb begin publicly trading before Jan 1, 2021?

Yes 0¢Vol: $89.7k

Will a new Supreme Court Justice be confirmed before Nov 3rd, 2020?

Yes 0¢Vol: $43.3k

Related terms

Resolution

The process of settling a prediction market after the outcome is determined. When a market resolves, winning outcome tokens pay out $1 each and losing tokens become worthless.

Implied Probability

The probability of an outcome as implied by the market price. A contract trading at $0.65 implies a 65% probability of that outcome occurring. Comparing implied probabilities across markets can reveal trading opportunities.

Bid Collapse

When buy-side liquidity suddenly disappears from an order book, causing prices to drop rapidly. PredCopy detects bid collapse scenarios and can automatically exit positions to protect capital.

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