Catalyst, a Python-based algorithmic trading library for cryptoassets, is available. It allows trading strategies to easily be expressed and backtested against historical data (with minute and daily resolution), providing insights and analytics regarding a strategy's performance. Catalyst supports live trading of crypto-assets, starting with four exchanges (Binance Bitfinex, Bittrex and Poloniex), with more being added in the future. Catalyst allows users to share and curate information and create profitable, data-driven investments strategies. Visit catalystcrypto.io for more information about Catalyst. Catalyst is built on top of the Zipline project. To maximize compatibility with existing trading algorithm, developer knowledge, tutorials, and other API features, we tried to minimize structural changes. For technical support and questions about Catalyst, algorithmic trades, and more, join us on the Catalyst Forum.