Matching Engine 101: The Challenges of Matching Orders Quickly and Reliably

The centerpiece of every financial exchange is its matching engine. This is what allows traders to enter and exit markets, buying and selling at the best price currently available. As their market orders are filled from the limit orders of other traders in the order book, the balance between the best available buy/sell prices adjusts, setting a new market price.     In computer science, matching engines are known as state machines source: https://beincrypto.com/matching-engine-101-the-challenges-of-matching-orders-quickly-and-reliably/