MQL4 Custom Indicator

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Hi, does anyone know why Alert(array1[]) is showing values of 0? Even though LineBuffer1 is plotting the line correctly with values.

Thanks

#property indicator_separate_window
//#property indicator_minimum 0
//#property indicator_maximum 1
#property indicator_buffers 1
#property indicator_plots   1
//--- plot line1
#property indicator_label1  "line1"
#property indicator_type1   DRAW_LINE
#property indicator_color1  clrRed
#property indicator_style1  STYLE_SOLID
#property indicator_width1  1
//--- indicator buffers
input int AveragingPeriod = 20;
extern int History  =400;            // Amount of bars in calculation history
double array1[400];





double line1Buffer[];






//+------------------------------------------------------------------+
//| Custom indicator initialization function                         |
//+------------------------------------------------------------------+
int init()
  {
//--- indicator buffers mapping
   SetIndexBuffer(0,line1Buffer);
   ArraySetAsSeries(array1,true);
//---
   return(INIT_SUCCEEDED);
  }
//+------------------------------------------------------------------+
//| Custom indicator iteration function                              |
//+------------------------------------------------------------------+





//+------------------------------------------------------------------+
int start()                            // Special function start()
  {
   int i,                              // Bar index
       n,                              // Formal parameter (index)
       k,                              // Index of indicator array element
       Counted_bars;                   // Number of counted bars
       double
       high;                            // High and Low sum for the period
//--------------------------------------------------------------------
   Counted_bars=IndicatorCounted();    // Number of counted bars
   i=Bars-Counted_bars-1;              // Index of the 1st uncounted
   if (i>History-1)                    // If too many bars ..
     { i=History-1; }                    // ..calculate for specified amount.
  
   while(i>=0)                         // Loop for uncounted bars
     {
     array1[i] =iBands(NULL,NULL,20,2,0,0,1,i) - iBands(NULL,NULL,20,2,0,0,2,i);
     
     if(array1[i]>high) {high= array1[i];}
         
         
     line1Buffer[i] = array1[i]/high;
      if(i=20)
      {
      Alert(array1[22]); // showing value of 0
      Alert(array1[10]); //showing value of 0
      break;}
 
      i--;                             // Calculating index of the next bar
     }
//--------------------------------------------------------------------
   return;                             // Exit the special funct. start()
 

Alert(array1[10]) equals to zero makes sense because at i = 20 it has not calculated the index 10 yet

for the other one i dunno it should work

  
  1. Hi, does anyone know why Alert(array1[]) is showing values of 0? Even though LineBuffer1 is plotting the line correctly with values.

Thanks
    You typed your comments inside SRC block and made it non-SRC

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  2. Use the debugger or print out your variables, including _LastError and prices and find out why. Do you really expect us to debug your code for you?

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