Execution Policy – The set of rules a broker or platform uses to process orders. Common policies in Forex are Instant Execution (order fills at the quoted price with possible requotes) and Market Execution (orders fill at current market price, possibly different from the quote). For example, in MT4 an account might be configured for Instant Execution (requotes if price changes beyond tolerance) or Market Execution (no requotes, but possible slippage). Forex robots must be aware of execution policy: Instant Execution guarantees price (or a chance to cancel) but can stall during volatility, while Market Execution guarantees fill (no requote) but can incur large slippage.

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