WebSocket
WebSocket is the IETF protocol for a two-way connection between a client and a server, after an opening handshake, over TCP.
Explanation
RFC 6455 says the protocol is an opening handshake followed by message framing, layered over TCP. It is meant for browser applications that need two-way communication without opening many HTTP connections or using long polling. The RFC names stock tickers as one of the uses, along with games and multi-user editing. A trading API can use a WebSocket for a stream of prices. The RFC is the definition of the protocol. It does not say that any particular broker offers one. FIX can also be carried over a WebSocket. The FIX standards page gives that as an example of transport independence. The business messages are still FIX.
This page explains published terms for education and reference. It is not financial, investment, tax, or trading advice, and it does not recommend a firm, product, or strategy.
Related terms
Sources and last check
Last checked . Rules, prices, and product names change. Read the source.