Questions from Beginners MQL5 MT5 MetaTrader 5 - page 1173

[Sunriser]

MQL5 iBarShift

According to mql5 documentation, the iBarShift function returns a value of int type.

int#

The int type has a size of 4 bytes (32 bits). The minimum value is -2 147 483 648, the maximum value is 2 147 483 647.

MyiBarShift does not want to give a value greater than 99999

I draw a trend line on the chart, the following script gets the start time of the line and outputs the bar number of that time.

When the line is shifted back in the history at some point the output value stops at 99999, and if

boolexact=false// mode

change it to true, it prints -1, and GetLastError = 0

void OnStart()
  {
int total = ObjectsTotal(0, 0, -1);  // Общее кол-во объектов на: /текущий график/главное окно/все типы объектов
datetime time0 = 0; // Время соответствующее началу трендовой линии
string objname = ""; // Имя объекта (трендовой линии)
int shift = 0; // Номер бара, соответствующего времени начала трендовой линии time0

for(int i = total - 1; i >= 0; i--)
     {
     objname = (string)ObjectName(0, i, 0, OBJ_TREND);
     time0 = ObjectGetInteger(0, objname, OBJPROP_TIME, 0);
     shift = iBarShift(NULL, PERIOD_M1, time0, false);
     Comment("shift: ", shift, " Error: ", GetLastError());
     Sleep(2000);
     }
  }

What's wrong?

I tried different charts of different brokers, the time from the line is reading correctly, if I change PERIOD_M1 to M5, for example, then I need to move further in the history to reach 99999

[Uladzimir Izerski]

Sunriser:

MQL5 iBarShift

According to mql5 documentation, the iBarShift function returns a value of int type.

int#

The int type has a size of 4 bytes (32 bits). The minimum value is -2 147 483 648, the maximum value is 2 147 483 647.

MyiBarShift does not want to give a value greater than 99999

I draw a trend line on the chart, the following script gets the start time of the line and outputs the bar number of that time.

When the line is shifted back in the history at some point the output value stops at 99999, and if

boolexact=false// mode

change it to true, it prints -1, and GetLastError = 0

What's wrong?

I tried different charts of different brokers, the time from the line is reading correctly, if I change PERIOD_M1 to M5, for example, I need to move further in the history to reach 99999.

First of all check the maximum number of bars in the terminal settings.

[Sunriser]

Uladzimir Izerski:

First check the maximum number of bars in the terminal settings.

Thank you!

It was 10000, changed it to unlimited and it worked.

Not an obvious thing though...

[Vitaly Muzichenko]

Help in creating handles

Here's the thing

int OnInit()
  {
//-создадим хэндл индикатора
      handle=iAO(name,period);
//-если не удалось создать хэндл
   if(handle==INVALID_HANDLE)
     {
      ...
      return(INIT_FAILED);
     }

Question: From what parameters is the number (digits) of a handle assigned?
Can it be different after restarting the terminal?
Can it be different after a chart reinitialization?
In what cases can it change?

[Alexey Viktorov]

Vitaly Muzichenko:

Help in creating handles

Here's the thing

Question: From what parameters is the number (digits) of a handle assigned?
Can it be different after restarting the terminal?
Can it be different after a chart reinitialization?
In what cases can it change?

If there is only one indicator, it always has a handle of 10. Each successive one is equal to the previous one+1 and it all depends on the order in which the handles were created. It can only change if one of the previous ones gets an error.

[Vitaly Muzichenko]

Alexey Viktorov:

If you have one indicator, it always has a handle of 10. Each next one is equal to the previous one+1 and it all depends on the order in which the handles were created. It can only change if one of the previous ones gets an error.

I see, it's more or less understood. Thank you!

[Vitaly Muzichenko]

Vitaly Muzichenko:

Help in creating handles

There's a thing like this

Question: From what parameters is the number (digits) of a handle assigned?
Can it be different after restarting the terminal?
Can it be different after a chart reinitialisation?
In what cases can it change?

Found answers

[BillionerClub]

Where is it possible to insert a file so that it is visible, via inheritance, to all the files in the standard library?

[User_mt5]

Please advise how to correctly pass a multidimensional array into a function.

If I simply specify MyFun( &Mas[][] ) in the header, the compiler generates an error on accessing an array element Mas[j][k] in the function body... But how?

There seems to be no problem with one-dimensional ones.

[Alexey Viktorov]

User_mt5:

Please advise how to correctly pass a multidimensional array into a function.

If I simply specify MyFun( &Mas[][] ) in the header, the compiler generates an error on accessing an array element Mas[j][k] in the function body... But how?

There seems to be no problem with one-dimensional arrays.

The second and the next array's dimensions cannot be dynamic. Consequently, it must be MyFun(int &Mas[][7]) declared as an array, for example, int Mas[][7]; so it should be received.