An open, text-based messaging protocol for real-time electronic exchange of trade-related messages. FIX standardizes fields for orders, executions, quotes, etc., enabling different trading systems to communicate. It’s heavily used in institutional and high-frequency trading. In Forex, some brokers offer FIX APIs so trading systems can connect directly at the protocol level. FIX is relevant to Forex robots in advanced setups: developers may implement FIX engines to connect to FIX-enabled brokers (for faster, more granular control), though it’s more complex than typical REST APIs. Traders indirectly benefit if their platform supports FIX integration (e.g. bridges to fund accounts).

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