Forkast is a prediction market that combines offchain order matching with non-custodial onchain settlement. Users create markets and trade outcome shares using market or limit orders in a central limit order book. Order matching runs offchain, and matched trades settle onchain through smart contracts. Trading uses USDC that can be converted 1:1 into platform trading credits. Positions can be sold before resolution, and winning shares redeem for $1 while losing shares redeem for $0.