Any questions from newcomers on MQL4 and MQL5, help and discussion on algorithms and codes - page 968

[Sergey Basov]

Yevhenii Levchenko:
Are the quotes stored in the tester/history folder?

No.

\history\downloads\symbol*.dat - archive of quotes.

\history\server\*.hst - quotes.

\tester\history\*.fxt - generated from *.hst files every time you start test or optimization.

Forum on trading, automated trading systems and strategy testing

Question to MT4 developers: Tester files

Sergey Basov, 2016.01.14 07:25

I'm not an MT4 developer, but I can answer from personal experience.

Deleting them will not affect anything. They will just be generated again during the next testing or optimization.

The quotes are stored in *.hst files, from them the tester generates *.fxt files, and each time they are generated anew.

[Yevhenii Levchenko]

Sergey Basov:

No.

\history\downloads\*.dat - archive of quotes.

\history\server\*.hst - quotes.

\tester\history\*.fxt - generated from *.hst files every time you run a test or optimisation.

This stuff puts a lot of strain on the drive on startup... Why doesn't the tester delete it if it generates it again every time? Is there any way to set it up?

[Andrey Kaunov]

Nauris Zukas:

Hello! I wanted to get the opening time of the current month's bar, but got an error 4074 (ERR_NO_MEMORY_FOR_HISTORY). It's also interesting that if I start testing from June 1, everything is correct, but from June 2 the error starts to appear. How to solve this month's problem?

Hello!

I faced the same error 4074(ERR_NO_MEMORY_FOR_HISTORY) when testing with quotes from another broker. And it's not the first 3rd party quotes that I use. I haven't got such error with others. What is the reason for the error, and how to fix it, maybe someone has already figured it out?

[Yevhenii Levchenko]

Why does the simplest code in mt5 work completely differently than in mt4? For example, the following code, which calculates the average mt4 muwings buffer value:

for (int i=0; i<nLimit; i++){
         double value;
         for(int k=i; k<i+AveragePeriod; k++){
            value+=Buffer1[k];
         }
         AverageBuffer[i]=value/AveragePeriod;
      }

...doesn't work in mt5. To make it work in more or less similar way (by gut feeling method), you need it like this:

 for (int i=0; i<nLimit; i++){
         double value;
         for(int k=i; k<i+AveragePeriod; k++){
            value+=Buffer1[k];
         }
         value/=(AveragePeriod+1);
         AverageBuffer[i]=value;
      }

And then, the first 7 buffers show some prohibitive values. Everything further seems to work fine. My jaw tightened by such a trifle)

Please advise how to solve this correctly?

[Yevhenii Levchenko]

Added Comment between calculations and everything fucking redrawn :D

 for (int i=0; i<nLimit; i++){
         double value;
         for(int k=i; k<i+AveragePeriod; k++){
            value+=Buffer1[k];
         }
         if(i==2)
           
        Comment(value); // вот это добавил
         value/=(AveragePeriod+1);
         AverageBuffer[i]=value;
         
      }

What's the big deal?

[[Deleted]]

I can't figure out how to write such a condition with iFractal? If:

First Fractal_up< Second Fractal_up then.....

And the same for down fractal

[Алексей Тарабанов]

Vladimir Baskakov:
I can't figure out how to write such a condition with iFractal? If:

First Fractal_up< Second Fractal_up then.....

And the same with down fractal

Weekend. Fooling around...

[Igor Makanu]

Vladimir Baskakov:
I can't figure out how to write such a condition with iFractal? If:

First Fractal_up< Second Fractal_up then.....

And the same with down fractal

out of ready, this is how you look for fractals:

//_______________________________________________________________________
int GetLastFractals(int bar,int mode) // bar - с какого бара начинать поиск, mode = MODE_UPPER или MODE_LOWER , результат № бара где найден фрактал
  {
   int i=bar; 
   while(i<Bars && iFractals(NULL,0,mode,i)<_Point) i++;
   return(i);
  }
//_______________________________________________________________________

You need to call 2 times to find the first fractal and the subsequent Up, roughly like this:

int barfrup_1 = GetLastFractals(1,MODE_UPPER);
int barfrup_2 = GetLastFractals(barfrup_1+1,MODE_UPPER);

[Artyom Trishkin]

Yevhenii Levchenko:

Added Comment between calculations and everything fucking redrawn :D

What's the trick?

ArraySetAsSeries(true) for indicator buffers.

[[Deleted]]

Igor Makanu:

from ready-made, this is how you look for fractals:

You need to call you 2 times to find the first fractal and the next Up, like this:

Thanks, it works, only one condition is met:

        if(barfrup_1<barfrup_2 && barfrdown_1<barfrdown_2)

And I need

        if(barfrup_1<barfrup_2 && barfrdown_1>barfrdown_2)

And I can't open positions with it for some reason.