please help me!

[mrluck1]

int start()

{

double ExtMapBuffer1[];

   SetIndexStyle(0,DRAW_LINE);

   SetIndexBuffer(0,ExtMapBuffer1);

MathSrand(TimeLocal());



    for(int i=0; i<Bars; i++)

   {

      ExtMapBuffer1[i]= MathRand()%1001;

   }

      return(0);

}

Hi friends, i'm starting to learn to program, i have a question from a exercise, based on this code above

I really tried to understand this for loop, but i can't,  on that  ExtMapBuffer1 [i], if i understood right, the very first cycle this value will be 0 , right? and this value somehow 

will  bind to some bar or candle, but why and to what candle?  because its not open[] close[] or anything, i compiled and it creates the indicator, but i dont know why it works, thanks for any 

help 

[Fernando Carreiro]

mrluck1: i'm starting to learn to program, i have a question from a exercise, based on this code above. I really tried to understand this for loop, but i can't,  on that  ExtMapBuffer1 [i], if i understood right, the very first cycle this value will be 0 , right? and this value somehow will  bind to some bar or candle, but why and to what candle?  because its not open[] close[] or anything, i compiled and it creates the indicator, but i dont know why it works, thanks for any

Have a look at the following:

• Simple Programs in MQL4 - Creation of Custom Indicators - https://book.mql4.com/samples/icustom
  

However, you should read all the documentation on MQL4:

• MQL4 Documentation - https://docs.mql4.com/
• MQL4 Tutorial Book - https://book.mql4.com/

But pay special attention to the Updated form of MQL4 Language:

• Update MQL4 - https://docs.mql4.com/mql4changes

Also, have a look at the many examples of code available:

• CodeBase - https://www.mql5.com/en/code/mt4

Also, given that you are from Brazil, if you have difficulty with the English language, consider going over to the:

• Portuguese section - https://www.mql5.com/pt/forum