Selecting the latest placed order

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I want to select the latest placed order (open or pending) from trade mode but I don't want to use loop or magic number to minimize running time. Does this line of code help? Assume no order was closed or modified.

OrderSelect( ( OrdersTotal() -1 ),  SELECT_BY_POS, MODE_TRADES);
Documentation on MQL5: Constants, Enumerations and Structures / Environment State / Symbol Properties
Documentation on MQL5: Constants, Enumerations and Structures / Environment State / Symbol Properties
  • www.mql5.com
Symbol Properties - Environment State - Constants, Enumerations and Structures - MQL5 Reference - Reference on algorithmic/automated trading language for MetaTrader 5
 
macpee: I don't want to use loop or magic number to minimize running time. Does this line of code help? Assume no order was closed or modified.

Magic number only allows an EA to identify its trades from all others. Using OrdersTotal/OrdersHistoryTotal (MT4) or PositionsTotal (MT5), directly and/or no Magic number/symbol filtering on your OrderSelect / Position select loop means your code is incompatible with every EA (including itself on other charts and manual trading.)
          Symbol Doesn't equal Ordersymbol when another currency is added to another seperate chart . - MQL4 programming forum (2013)
          PositionClose is not working - MQL5 programming forum (2020)
          MagicNumber: "Magic" Identifier of the Order - MQL4 Articles (2006)
          Orders, Positions and Deals in MetaTrader 5 - MQL5 Articles (2011)
          Limit one open buy/sell position at a time - General - MQL5 programming forum (2022)

You need one Magic Number for each symbol/timeframe/strategy.
     Trade current timeframe, one strategy, and filter by symbol requires one MN.
     If trading multiple timeframes, and filter by symbol requires use a range of MN (base plus timeframe).
          Why are MT5 ENUM_TIMEFRAMES strange? - General - MQL5 programming forum - Page 2 #11 (2020)

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