Multiple ea running, how to allow

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Hi,

How are EAs coded such that they will not interfere with orders that are owned by other EAs? (assuming that is our intention - that is, process only the orders that each EA has initiated)

Is it using the comment? or the magic number? other?

In addition, what if an EA coincidentally is opened with the same differentiating field (e.g. same magic number), how is this handled? do we like generate a new unique magic num for it? or unique comment, if we are using comment?

I am hoping for your input.

Jesus Angeles

 
jcadong5 wrote >>

Hi,

How are EAs coded such that they will not interfere with orders that are owned by other EAs? (assuming that is our intention - that is, process only the orders that each EA has initiated)

Is it using the comment? or the magic number? other?

In addition, what if an EA coincidentally is opened with the same differentiating field (e.g. same magic number), how is this handled? do we like generate a new unique magic num for it? or unique comment, if we are using comment?

I am hoping for your input.

Jesus Angeles

create an integer for the Magic number and make SURE there is a different magic number for each EA.

 
jcadong5 wrote >>

Hi,

How are EAs coded such that they will not interfere with orders that are owned by other EAs? (assuming that is our intention - that is, process only the orders that each EA has initiated)

Is it using the comment? or the magic number? other?

In addition, what if an EA coincidentally is opened with the same differentiating field (e.g. same magic number), how is this handled? do we like generate a new unique magic num for it? or unique comment, if we are using comment?

I am hoping for your input.

Jesus Angeles

//| Make Magic Number |
//+------------------------------------------------------------------+
int MakeMagicNumber( int ExpertID, bool TimeSpecific )
{
int SymbolCode = 0;
int PeriodCode = 0;
int MagicNumber = 0;

//---- Symbol Code
if( Symbol() == "AUDCAD" || Symbol() == "AUDCADm" ) { SymbolCode = 1000; }
else if( Symbol() == "AUDJPY" || Symbol() == "AUDJPYm" ) { SymbolCode = 2000; }
else if( Symbol() == "AUDNZD" || Symbol() == "AUDNZDm" ) { SymbolCode = 3000; }
else if( Symbol() == "AUDUSD" || Symbol() == "AUDUSDm" ) { SymbolCode = 4000; }
else if( Symbol() == "CHFJPY" || Symbol() == "CHFJPYm" ) { SymbolCode = 5000; }
else if( Symbol() == "EURAUD" || Symbol() == "EURAUDm" ) { SymbolCode = 6000; }
else if( Symbol() == "EURCAD" || Symbol() == "EURCADm" ) { SymbolCode = 7000; }
else if( Symbol() == "EURCHF" || Symbol() == "EURCHFm" ) { SymbolCode = 8000; }
else if( Symbol() == "EURGBP" || Symbol() == "EURGBPm" ) { SymbolCode = 9000; }
else if( Symbol() == "EURJPY" || Symbol() == "EURJPYm" ) { SymbolCode = 1000; }
else if( Symbol() == "EURUSD" || Symbol() == "EURUSDm" ) { SymbolCode = 1100; }
else if( Symbol() == "GBPCHF" || Symbol() == "GBPCHFm" ) { SymbolCode = 1200; }
else if( Symbol() == "GBPJPY" || Symbol() == "GBPJPYm" ) { SymbolCode = 1300; }
else if( Symbol() == "GBPUSD" || Symbol() == "GBPUSDm" ) { SymbolCode = 1400; }
else if( Symbol() == "NZDJPY" || Symbol() == "NZDJPYm" ) { SymbolCode = 1500; }
else if( Symbol() == "NZDUSD" || Symbol() == "NZDUSDm" ) { SymbolCode = 1600; }
else if( Symbol() == "USDCAD" || Symbol() == "USDCADm" ) { SymbolCode = 1700; }
else if( Symbol() == "USDCHF" || Symbol() == "USDCHFm" ) { SymbolCode = 1800; }
else if( Symbol() == "USDJPY" || Symbol() == "USDJPYm" ) { SymbolCode = 1900; }


//---- Period Code
if( TimeSpecific )
{
if( Period() == 1 ) { PeriodCode = 10; }
else if( Period() == 5 ) { PeriodCode = 20; }
else if( Period() == 15 ) { PeriodCode = 30; }
else if( Period() == 30 ) { PeriodCode = 40; }
else if( Period() == 60 ) { PeriodCode = 50; }
else if( Period() == 240 ) { PeriodCode = 60; }
else if( Period() == 1440 ) { PeriodCode = 70; }
else if( Period() == 10080 ){ PeriodCode = 80; }
}
else
{
PeriodCode = 0;
}
//---- Calculate MagicNumber
MagicNumber = ExpertID+SymbolCode+PeriodCode;
return(MagicNumber);
}

 

Thank you spacechimp and Kent.

Is magic number the thing that will resolve this requirement?

Is this 'magic number' useless in the MQL4/MT4 and can therefore be used for any purpose we want, just like identifying EA-instance-owned-orders?

In other words, MT4 doesnt initialize it, doesnt update it, and doesnt touch it in any way? Nothing except our EA touches it?

 

The magic number is given to OrderSend() then it can't be changed. The magic number will do exactly what you want here. I'm not sure I'd go with the whole code above myself since it's more limited than specifying it yourself in an extern but it would do what you need it to do in your case.

.

Jon

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