Data Structures

MQL5 Language offers 12 predefined structures:

• MqlDateTime is intended for working with date and time;
• MqlParam can send input parameters when creating a handle of the indicator using the IndicatorCreate() function;
• MqlRates is intended for manipulating the historical data, it contains information about the price, volume and spread;
• MqlBookInfo is intended for obtaining information about the Depth of Market;
• MqlTradeRequest is used for creating a trade request for trade operations;
• MqlTradeCheckResult is intended for checking the prepared trade request before sending it;
• MqlTradeResult contains a trade server reply to a trade request, sent by OrderSend() function;
• MqlTradeTransaction contains description of a trade transaction;
• MqlTick is designed for fast retrieval of the most requested information about current prices.
• Economic calendar structures are used to obtain data on the economic calendar events sent to the MetaTrader 5 platform in real time. Economic calendar functions allow analyzing macroeconomic parameters immediately after new reports are released, since relevant values are broadcast directly from the source with no delay.