Does it matter if I don't put magic number in different ea if I want to put multiple ea of different chart?

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because I only open position,

I didn't open any pending order,

magic number only useful when identify pending order,

am I right?

 

No, you are not.

  1. Depends on how it/they is/are coded; ask the owner, or provide the code.

    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.


  2. ziyang2048: because I only open position,

    One position per chart is not the same as one position.

 
William Roeder #:

No, you are not.

  1. Depends on how it/they is/are coded; ask the owner, or provide the code.

    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.


  2. One position per chart is not the same as one position.

thanks for answering.

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