MQL4 Trade Functions
Overview
Functions for managing trading activities in Expert Advisors and scripts.
Core Functions
**OrderSend**: Opens or places a pending order.
**OrderClose**: Closes an opened order.
**OrderCloseBy**: Closes an opened order by another opposite opened order.
**OrderModify**: Modifies characteristics of opened or pending orders.
**OrderDelete**: Deletes a previously opened pending order.Order Details Retrieval
**OrderClosePrice**: Returns close price.
**OrderCloseTime**: Returns close time.
**OrderComment**: Returns comment.
**OrderCommission**: Returns calculated commission.
**OrderExpiration**: Returns expiration date (pending orders).
**OrderLots**: Returns amount of lots.
**OrderMagicNumber**: Returns identifying (magic) number.
**OrderOpenPrice**: Returns open price.
**OrderOpenTime**: Returns open time.
**OrderProfit**: Returns profit.
**OrderSwap**: Returns swap value.
**OrderSymbol**: Returns symbol name.
**OrderStopLoss**: Returns stop loss value.
**OrderTakeProfit**: Returns take profit value.
**OrderTicket**: Returns ticket number.
**OrderType**: Returns order operation type.Order Management
**OrderPrint**: Prints order information to the log.
**OrderSelect**: Selects an order for further processing.Order Counts
**OrdersHistoryTotal**: Returns the number of closed orders in history.
**OrdersTotal**: Returns the number of open market and pending orders.Constraints & Requirements
Trading functions modifying account state require "Allow live trading" enabled in Expert Advisor/script properties.
Trade permission is subject to various factors (see Trade Permission section).Advanced Features
**OrderSendAsync**: For asynchronous trading operations, executes in < 1ms, returns control immediately. Accelerates trading operations significantly, crucial for intraday systems.