Why don't you use ccxt?

Jesse uses WebSocket connection for live trading as much as possible to prevent hitting rate limits of exchanges and keeping data fresh in real-time.

CCXT offers WebSocket connection only in its PRO version and is mainly popular for its REST API. Another reason we don't use them is that we try to avoid using general solutions because each exchange has its own little details that we need to consider. Rather than focusing on how many exchanges we support, we try to get the quality right.