Trading
Above and Below contracts share one order book. Orders are processed off-chain, while trades are settled on-chain.
One outcome, one order book
On many prediction platforms, Above and Below are presented as separate markets or order books. That can split orders and liquidity between two views of the same question.
Settle treats them as complementary sides of one market and brings both into a single shared order book. One side always defines the other, giving traders one pool of liquidity while keeping prices aligned.
Order types
GTCGood ’til cancelled. Any unfilled quantity stays open until it fills, expires, or is cancelled.
IOCImmediate or cancel. Available quantity fills immediately; the remainder is cancelled.
Post-onlyAdd liquidity only. The order is rejected if it would cross the order book and execute immediately.
An order that would cross your own resting order is rejected outright.
Order minimums, ticks, and lifetime
0.001 ETH notional
Fractional quantities supported
Whole percentages from 1–99
A signed order stops being usable when its market expires. The app signs the order expiry as the market expiry, capped at 24 hours. The API accepts signed order expiries up to seven days.
Cancel an order
An ordinary cancellation is processed off-chain and requires only a wallet signature. To cancel on-chain, call cancelOrder for one order or bumpNonce to invalidate every outstanding order signed with an older nonce.
Placing and ordinarily cancelling orders require signatures, not transactions. Matched trades and on-chain cancellations require network gas.