OrderSend Error 138 (or ERR_REQUOTE) may appear during the execution (but not backtesting) of the MetaTrader expert advisors (only in MT4, as the MetaTrader 5 platform uses a different system of OrderSend error codes). Error 138 means that the broker replied with a “Requote” signal to your expert advisor’s OrderSend function. That means that the price used in the order is outdated compared to the current market price. There are two main […]
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