Loop multiple times with one Expert and write results to file

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Hi,

Is it possible to loop with one Expert using different extern properties, detached from chart and saving result to file?

If for example my Expert use 2 EMA for buy/sell and I would like to loop to test different case as :

// Test for the first with EMA(15) to EMA(32) and the second EMA(6) to EMA(12)

for( int a=15 ; a <= 32; a++){
for( int b=6; b < 12; b++){
' set my "extern" variables of my Expert "a" and "b"
MyExpert.a = a;
MyExpert.b = b;
MyExpert.start();
' Write to file the final result, number of trades, goods and bads, final amount "a-b;totalTrades;goods;bads;finalAmount"
' After if I need more details I could replay it directly from MetaTrader System Tester with the specific properties
}
}

If you can provide me a little example, it will be really appreciate.

Thanks for your help.
 

the best way is to use optimizer and encode your file name with the variables something like this:

"expfile_ma"+a+"_ma"+b+".log"

you canr run optimizer in steps optimizing one variable and changing second manually to make it manageable:

such a=15 optimize b=6 to 12,

a=16 optimize again b=6 to 12 and so on.

 
Thanks, but I still a bit confuse of how you write code to start looping execution with my differents properties at each iteration.

In Java we could use de main(String[] args) function .... create instance of class and set properties before starting process.

but in MQL4 how can you start it (always not attached to charts ) , create a new test with new properties at each iteration?


Sorry I'm very new in MQL4 but I have experience with Java ... if you want to use another language for comparaison.


Thx
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