How to solve a problem with the Strategy Tester - MQL4 and MetaTrader 4

Ivan Butko 2022.04.17 12:36 #19471

Can you please tell me how to solve:

1) I have not loaded the history, in the chart window during the online process I had time to load 70 000 minute bars. I am loading my Expert Advisor in the Strategy Tester and just in case I have written the minimum number of bars for a certain pattern, it answered with "not enough bars for analysis". I print iBars and it says 1200 bars. I loaded history (8 000 000 bars). Restarted, settings show "9999999999" bars in window and history. Nova writes "not enough history". Print iBars, again 1200. what is this and how to solve it?

2) In the multicurrency analysis, how can I force the indicator not to miss new incoming ticks on other currency pairs, if the quotes are suddenly frozen on the current chart and OnTick does not call the check? I tried OnTimer but it does not work in the tester

Not enough bars?" iBars() Stress Test SideWinder for CCI: My

Alexandr Sokolov 2022.04.18 08:54 #19472

In this script, I'm experimenting with resizing dynamic arrays that have different indexing directions - in order to understand which side new cells appear after increasing array size

void OnStart()
  {
   
   int a[], b[], size = 5, new_size = size + 5;
   
   if( ArraySize( a ) != size )
     ArrayResize( a, size, 0 );
   
   if( ArraySize( b ) != size )
     ArrayResize( b, size, 0 );
   
   if( ArrayGetAsSeries( a ) )
     ArraySetAsSeries( a, false );
   
   if( !ArrayGetAsSeries( b ) )
     ArraySetAsSeries( b, true );
   
   for( int i = 0; i < size; i++ )
     {
      a[i] = i;
      b[i] = i;
     };
   
   ArrayResize( a, new_size, 0 );
   ArrayResize( b, new_size, 0 );
   
   for( int i = 0; i < new_size; i++ )
     {
      Alert( "a", i, " ", a[i] );
      Alert( "b", i, " ", b[i] );
      Alert(" ");
     };
   
  }

And here is the result

It turns out that array b[] (which has reverse indexation) somehow duplicates its values after increasing the size

. Why? Am I missing something or have I made some mistake?

Impulse Array out of range Errors, bugs, questions

JRandomTrader 2022.04.18 09:37 #19473

Alexandr Sokolov indexing directions - in order to understand which side new cells appear after increasing array size

And this is the result

It turns out that array b[] (which has reverse indexing) has somehow duplicated values after increasing size

Why? Am I missing something or have I made some mistake?

In any case, we cannot rely on any values in the new array cells - these are uninitialised variables that can contain any rubbish.

Alexey Viktorov 2022.04.18 09:39 #19474

Alexandr Sokolov indexing directions - in order to understand which side new cells appear after increasing the array size

And this is the result

It turns out that array b[] (which has reverse indexing) has somehow duplicated values after increasing the size

Why? Am I missing something or have I made some mistake?

You have to flip the array after it has been filled.

Alexandr Sokolov 2022.04.18 09:43 #19475

JRandomTrader #:

In any case we can't rely on any values in the new array cells - these are uninitialized variables that can contain any rubbish.

True, but there are 2 buts
1) Mirroring is observed at any other size and not only, as in my example - 5
2) If an array has reverse indexing, then new cells should appear at the beginning of the array - which is not the case

How to use arrays can i find a Any rookie question, so

Alexandr Sokolov 2022.04.18 09:45 #19476

Alexey Viktorov #:

You have to flip the array after filling it.

I also thought of that - at least I don't see any other solution at the moment

Igor Makanu 2022.04.18 18:36 #19477

Alexandr Sokolov #:

2) If an array is reverse-indexed, then new cells should appear at the beginning of the array - which is not the case

Why should new cells appear at the beginning of an array? - If I'm not mistaken, it should be written in the help, that when you use ArraySetAsSeries(), the array will not be physically reallocated in memory, but reverse indexing will be applied when accessing array elements

SZZ: your example is complicated, I sketched it out:

#property strict
//+------------------------------------------------------------------+
void OnStart()
{
   int arr1[] = {1, 2, 3, 4, 5};
   int arr2[] = {1, 2, 3, 4, 5};
   ArraySetAsSeries(arr2, true);
   Print("Start size : ", ArraySize(arr1), " , ", ArraySize(arr2));
   Print("Resize : ", ArrayResize(arr1, 10), " , ", ArrayResize(arr2, 10));
   string s1 = "", s2 = "";
   for(int i = 0, j = 0; i < ArraySize(arr1) && j < ArraySize(arr2); i++, j++)
   {
      s1 += (string)arr1[i] + " , ";
      s2 += (string)arr2[j] + " , ";
   }
   Print("arr1 = ", s1);
   Print("arr2 = ", s2);
}

2022.04.18 21:31:59.223 tst EURUSD,H1: arr2 = 5 , 4 , 3 , 2 , 1 , 0 , 0 , 0 , 0 , 0 ,

2022.04.18 21:31:59.223 tst EURUSD,H1: arr1 = 1 , 2 , 3 , 4 , 5 , 0 , 0 , 0 , 0 , 0 ,

2022.04.18 21:31:59.223 tst EURUSD,H1: Resize : 10 , 10

2022.04.18 21:31:59.223 tst EURUSD,H1: Start size : 5 , 5

Features of the mql5 [WARNING CLOSED!] Any newbie [ARCHIVE!] Any rookie question,

Александр 2022.04.18 18:57 #19478

Please advise how it works in MT5

iClose(NULL,PERIOD_CURRENT,shift)

I get'iClose' error - ambiguous call to overloaded function.

In general, the goal is to select the TF.

I wanted to choose it with MT4 out of habit

if(iClose(NULL, TF(), 1) < iOpen(NULL, TF(), 1))

int TF()
  {
   int tf;
   switch(TF)
     {
      case 1 :
         tf = 1;
         break;
      case 2 :
         tf = 5;
         break;
      case 3 :
         tf = 15;
         break;
      case 4 :
         tf = 30;
         break;
      case 5 :
         tf = 60;
         break;
      case 6 :
         tf = 240;
         break;
      case 7 :
         tf = 1440;
         break;
      case 8 :
         tf = 10080;
         break;
      case 9 :
         tf = 43200;
         break;
      default:
         tf = 10;
         Print(tf);
     }
   return(tf);
  }

But I have failed.(

Andrei Sokolov 2022.04.19 10:09 #19479

Александр 'iClose' error - ambiguous call to overloaded function.
In general, the goal is to select the TF.

I wanted to choose it with MT4 out of habit

But I failed.

periods in MT5

if(Period()==1) return "M1";

if(Period()==2) return "M2";

if(Period()==3) return "M3";

if(Period()==4) return "M4";

if(Period()==5) return "M5";

if(Period()==6) return "M6";

if(Period()==10) return "M10";

if(Period()==12) return "M12";

if(Period()==15) return "M15";

if(Period()==20) return "M20";

if(Period()==30) return "M30";

if(Period()==16385) return "H1";

if(Period()==16386) return "H2";

if(Period()==16387) return "H3";

if(Period()==16388) return "H4";

if(Period()==16390) return "H6";

if(Period()==16392) return "H8";

if(Period()==16396) return "H12";

if(Period()==16408) return "Daily";

if(Period()==32769) return "Weekly";

if(Period()==49153) return "Monthly";

Why are MT5 ENUM_TIMEFRAMES Which timeframes do you Errors, bugs, questions

Александр 2022.04.19 13:10 #19480

Andrei Sokolov #:

periods in mt5