Questions from Beginners MQL5 MT5 MetaTrader 5 - page 603

[[Deleted]]

Alex:

Thank you for your answers and patience.

Vladimir, I've probably bored you already:) But I'm having a hard time with the basics. I tried to do a test task with Copy functions... The indicator isn't drawn, though there are numbers in Printe... I don't understand anything.

One and the same array UpBar goes to two buffers: 0 and 1.

And for the indexes you don't want to set values for, write empty values.

And, as far as I understand, you are writing values from 3 to 3 bars. This means that the earliest values will be written, not the latest (the numbering order is different from mql4).

[Vladimir Karputov]

Alex:

Thank you for your answers and patience.

Vladimir, I've probably bored you already:) But I'm having a hard time with the basics. I tried to do a test task with Copy functions... The indicator isn't drawn, though there are numbers in Printe... I don't understand anything.

//+------------------------------------------------------------------+
//|                                                        PBars.mq5 |
//|                                                                  |
//|                                                                  |
//+------------------------------------------------------------------+
#property copyright ""
#property link      ""
#property version   "1.00"
#property indicator_separate_window
#property indicator_buffers 3
#property indicator_plots   1
//--- plot UpBar
#property  indicator_label1  "UpBar"
#property  indicator_type1   DRAW_HISTOGRAM
#property  indicator_color1  clrGreen
#property  indicator_style1  STYLE_SOLID
#property  indicator_width1  6
////--- plot DnBar
//#property indicator_label2  "DnBar"
//#property indicator_type2   DRAW_HISTOGRAM
//#property indicator_color2  clrRed
//#property indicator_style2  STYLE_SOLID
//#property indicator_width2  6
//--- input parameters
input int   Histori=30;
input ENUM_TIMEFRAMES TimeFrame=0;
input string  Simvol="EURUSD";
//--- indicator buffers
double         UpBar[];
//double         DnBar[];
double         O_Price[];
double         C_Price[];
//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int OnInit()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0,UpBar,INDICATOR_DATA);
//SetIndexBuffer(1,UpBar,INDICATOR_DATA);
   SetIndexBuffer(1,O_Price,INDICATOR_CALCULATIONS);
   SetIndexBuffer(2,C_Price,INDICATOR_CALCULATIONS);
//---
   ArraySetAsSeries(O_Price,true);
   ArraySetAsSeries(C_Price,true);
   ArraySetAsSeries(UpBar,true);
   ArrayInitialize(UpBar,0.0);
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+
int OnCalculate(const int rates_total,
                const int prev_calculated,
                const datetime &time[],
                const double &open[],
                const double &high[],
                const double &low[],
                const double &close[],
                const long &tick_volume[],
                const long &volume[],
                const int &spread[])
  {
   ArraySetAsSeries(open,true);
   ArraySetAsSeries(close,true);

   if(prev_calculated==0)
     {
      ArrayInitialize(UpBar,0.0);
      ArrayInitialize(O_Price,0.0);
      ArrayInitialize(C_Price,0.0);
      Print(__FUNCTION__);
      ResetLastError();
      if(CopyOpen(Simvol,TimeFrame,0,Histori,O_Price)==-1)
         Print("Error CopyOpen #",GetLastError());
      ResetLastError();
      if(CopyClose(Simvol,TimeFrame,0,Histori,C_Price)==-1)
         Print("Error CopyClose #",GetLastError());
      for(int t=3; t<Histori; t++)
        {
         UpBar[t]=MathAbs(NormalizeDouble((O_Price[t]-C_Price[t]),Digits()));
         Print(IntegerToString(t)," ",DoubleToString(UpBar[t],Digits()));
         int g=0;
        }
     }
   return(rates_total);
  }
//+------------------------------------------------------------------+

And the result:

[Aleksandr Pedenko]

Karputov Vladimir:

And the result:

Once again, thank you very much.

[Vladimir Karputov]

Alex:
Once again, thank you very much.

You are welcome. Do not hesitate to contact me if you have any questions on MQL5.

[Aleksey Vyazmikin]

Are there any functions in MQL4 that give maximum/minimum price values for a given number of bars?

I think there was one, but I can't find it...

[[Deleted]]

-Aleks-:

Are there any functions in MQL4 that give maximum/minimum price values for a given number of bars?

I think there was one, but I can't find it...

https://docs.mql4.com/ru/series/ihighest

https://docs.mql4.com/ru/series/ilowest

[Aleksey Vyazmikin]

Vladimir Zubov:

https://docs.mql4.com/ru/series/ihighest

https://docs.mql4.com/ru/series/ilowest

Yes, yes thanks - I didn't look hard enough - I've already found it myself.

[Alexey Viktorov]

-Aleks-:
Yes, thank you - I didn't look hard enough - I've already found it myself.

Functions compatible with mql5 CopyHigh and CopyLow then in the resulting array ArrayMaximum and ArrayMinimum

[Евгений]

Is it true that each set of variables that make up a trading system has a random distribution of profits and losses?

[[Deleted]]

Евгений:

Is it true that each set of variables that make up a trading system has a random distribution of profits and losses?

A counter question.

Do you think that the movement of any currency pair: chart, bid and ask prices, etc., depend on the set of your variables?