Tatum Order Book
Tatum introduced Tatum Order Book: Essential crypto-exchange functionality at your fingertips.
Tatum Order Book have a powerful built-in features, it provides essential backend functionality to allow customers to open, cancel, list, and chart trades according to various useful parameters.
About Tatum:
Tatum is an open source blockchain middleware unifying multiple blockchains into one simple interface. Tatum’s mission is to empower great software developers to build an amazing apps on blockchain.
FULL INFO:
https://blog.tatum.io/feature-of-the-week-tatum-order-book-be211cf3ba39