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If OrderSend() returns true but your Expert Advisor cannot find the expected open position, the Boolean alone does not confirm that a trade executed. Check the server’s retcode, follow the order-to-deal-to-position lifecycle, and use the right position identifier for the account’s netting or hedging mode.
1. Check the server result code, not only the Boolean
OrderSend() takes a MqlTradeRequest and a MqlTradeResult. A true return means the request passed basic checks and was accepted for further processing; the server may complete the trade operation later. In particular, MetaQuotes cautions that a successful return for a market deal request does not prove that the requested trade was executed. MQL5 Reference: OrderSend
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Read result.retcode to learn how the trade server handled the request. The fields in MqlTradeResult answer different questions: deal is a deal ticket if a deal was performed, while order is an order ticket if an order was placed. Neither field is itself confirmation of an open position. Log result.comment and, when a response from an external trading system matters, inspect result.retcode_external; its meaning can depend on that system. MQL5 Reference: Trade Request Result Structure
For example, the documented return codes distinguish an order being placed from a request being completed or partially completed. Interpret the code in the context of the operation you sent rather than treating any nonzero result field as success.
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| Return code | Meaning | What it tells you |
|---|---|---|
TRADE_RETCODE_PLACED (10008) |
Order placed | An order was placed; this is not, by itself, confirmation of a filled position. |
TRADE_RETCODE_DONE (10009) |
Request completed | The request completed; inspect account state to determine the resulting position. |
TRADE_RETCODE_DONE_PARTIAL (10010) |
Request completed partially | Only part of the requested volume completed. |
These are MQL5 API constants, not guarantees about how every broker, instrument, account configuration, or external system behaves. Consult the MQL5 trade server return-code reference for codes beyond these examples. Do not retry every unsuccessful result automatically: a retry can duplicate an action or repeat a request that is structurally invalid.
2. Follow the order, deal, and position lifecycle
An order, a deal, and a position are distinct objects. In MetaQuotes’ documented market-buy example, the request creates an order; execution removes it from the open-order list and moves it to order history; a deal is added to deal history; and a position is created. A single request can therefore produce several trade transactions, and the account state may not yet show the position when the initial call returns. MQL5 Reference: OrderSend
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Use trade events or a fresh account-state query to establish what happened instead of inferring a position from the immediate return. The MQL5 technical chapter describes correlating later progress with the request ID in OnTradeTransaction(), or analyzing current orders, deals, and positions. Transaction callbacks can be multiple for one request; request and result details are supplied to OnTradeTransaction() for request-type transactions. MQL5 Reference: Trade Transaction Types and MQL5 Algo Book: Sending a trade request
- Record the request ID and result fields when sending the request.
- Process relevant transaction events where event-driven handling fits your EA.
- After processing advances, inspect current orders, deal history, and positions to identify the resulting state.
- Treat
result.orderandresult.dealas order and deal identifiers respectively, not as position identifiers.
3. Use the correct position identifier when managing it
Finding that a trade executed is separate from targeting the right position in a later close or modification request. Set MqlTradeRequest.position appropriately for the account mode. In a hedging account, specify the position ticket. In a netting account, the symbol identifies the position, although the ticket can also be set. MQL5 Reference: Trade Request Structure
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If an EA uses the wrong identifier or assumes a hedging-style position when the account is netting (or vice versa), it can fail to address the position it intends to manage. Determine the account mode and use the corresponding field semantics when constructing the close or modification request.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Use OrderCheck as a preflight, not a fill confirmation
OrderCheck() can validate a request before submission and return check results, including projected account and margin information. It cannot establish that a later order was filled: that depends on the server response and the subsequent trade lifecycle. MQL5 Reference: OrderCheck
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EA debugging checklist
- Separate submission from execution: check the
OrderSend()Boolean, then examineresult.retcode,result.comment, and any relevantresult.retcode_external. - Trace the actual outcome: interpret
result.orderandresult.dealaccording to the request, then correlate transactions or query fresh orders, deals, and positions. - Target management requests correctly: set
request.positionfor the account’s netting or hedging mode when closing or modifying a position.
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