A general term for the methods used to connect a trading system with a broker’s execution engine. This could be a REST or FIX API provided by the broker, or a middleware “bridge” linking platforms. For example, brokers like OANDA or IG offer RESTful trading APIs for order execution and account management, while Interactive Brokers provides its own API (and FIX). In another case, a software bridge might link MetaTrader to a different broker’s liquidity. These integrations are critical: they enable EAs and external apps to place trades and fetch account data. Developers program against Broker APIs to automate execution, and traders ultimately rely on these integrations to get orders into the market.

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