Adding IOC, FOK, and Stop Orders to a Matching Engine

A matching engine that only supports limit and market orders is a toy. Real exchanges need orders that expire, orders that demand all-or-nothing execution, and orders that sleep until a price condition is met. This article covers the implementation of time-in-force policies (GTC, IOC, FOK) and conditional stop orders (Stop-Market, Stop-Limit) in MatchEngine . Time-in-Force: How Long Does an Order Live? Time-in-force (TIF) controls what happens to an order's unfilled remainder after the matching