Cross-exchange gap calculator

If Yes is cheaper on one exchange and No is cheaper on the other, buying both locks in $1 per pair at settlement. This shows whether that survives fees.

Leg A: buy Yes on

Yes price on A (cents)

Leg B: buy No on

No price on B (cents)

Pairs (contracts per leg)

—Total cost incl. fees

—Fees

—Result at settlement

—Return on capital

Not risk-free. The two exchanges may resolve "the same" event differently, capital is locked until settlement, prices move while you place the second leg, and most US users cannot use Polymarket.com. Read the arbitrage guide and see how often gaps appear.