Square

ta4j

A Java library for technical analysis.

Stripe

Java library for the Stripe API.

Cassandre

Create your Java crypto trading bot in minutes. Our Spring boot starter takes care of exchange connections, accounts, orders, trades, and positions so you can focus on building your strategies.

Parity

Parity is an open-source software platform designed for trading venues, enabling the operation of financial marketplaces, development of algorithmic trading agents, and research into market microstructure. It provides a comprehensive suite of applications and libraries tailored for high-performance financial systems. ## Key Features - **Trading System** — Server application for running a financial exchange with order matching and trade execution. - **FIX Gateway** — Adds Financial Information Exchange (FIX) protocol support for industry-standard connectivity. - **Order Book Library** — High-performance order book reconstruction implementation on the JVM. - **Matching Algorithm** — Core engine for matching buy and sell orders within the trading system. - **Network Protocols** — Specifies and implements custom network protocols for system communication. - **Monitoring Tools** — Includes terminal client, stock ticker, and trade reporter for real-time monitoring and interaction. ## Philosophy Parity emphasizes modularity and performance, providing a complete, open-source foundation for building and researching financial trading systems without proprietary constraints.