using iOpen in an indicator?

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This indicator is supposed to show the open and close of the EURUSD in absolute value over the last hour.  When it is run it just draws a flat line, which should never be the case.  Anybody know where I went wrong?

 
//--------------------------------------------------------------------
#property indicator_separate_window    // Indicator is drawn in a seperate window
#property indicator_buffers 1       // Number of buffers
#property indicator_color1 Blue     // Color of the USD line
 
extern int LookBack=60;
double USD[];             // Declaring arrays (for indicator buffers)
//--------------------------------------------------------------------
 
 
int init()                          // Special function init()
  {
   SetIndexBuffer(0,USD);         // Assigning an array to a buffer
   SetIndexStyle (0,DRAW_LINE,STYLE_SOLID,1);// Line style
   return;                          // Exit the special funct. init()
  }
//--------------------------------------------------------------------
 
 
int start()                         // Special function start()
{
int i, Counted_bars;
 
Counted_bars=IndicatorCounted(); // Number of counted bars
for(i=Bars-Counted_bars-1-LookBack;i>=0;i--) // Index of the first uncounted
{
 
   //Get USD Value
   USD[i]=iClose("EURUSD",PERIOD_M1,i)-iOpen("EURUSD",PERIOD_M1,i+LookBack)
   
}
 
return;                          // Exit the special funct. start()
}
 

1. missing semicolon ";" on line:

USD[i]=iClose("EURUSD",PERIOD_M1,i)-iOpen("EURUSD",PERIOD_M1,i+LookBack)

2. BTW, start(),init() are typed functions. typed functions return typed value - return(aValue);

it then plots...

 

excuse me, I not say that I copy above code > add ";" > compile > run > it plot OK and NOT flat anywhere...

 

Counted_bars=IndicatorCounted(); // Number of counted bars

Comment("Bars to process = ", Bars-Counted_bars-1-LookBack); // add this line

if(Bars-Counted_bars-1-LookBack < 0) Alert("This isn't processing anything"); // add this line
for(i=Bars-Counted_bars-1-LookBack;i>=0;i--) // Index of the first uncounted
{

 
phy:

Counted_bars=IndicatorCounted(); // Number of counted bars

Comment("Bars to process = ", Bars-Counted_bars-1-LookBack); // add this line

if(Bars-Counted_bars-1-LookBack < 0) Alert("This isn't processing anything"); // add this line
for(i=Bars-Counted_bars-1-LookBack;i>=0;i--) // Index of the first uncounted
{

OK.
Changed it to the following:

CountedBars=IndicatorCounted();           // Number of counted bars
Print("Bars to process = ",CountedBars-1);
if(CountedBars-LookBack-1 < 0) Alert("This isn't processing anything");
for(i=CountedBars-LookBack-1;i>=0;i--)    // Index of the first uncounted

The lines move up and down now.  But they are still totally flat.  The seem to move based on the most recent calculation of:

iClose("EURUSD",PERIOD_M1,i)-iOpen("EURUSD",PERIOD_M1,i+LookBack)

in other words:

iClose("EURUSD",PERIOD_M1,0)-iOpen("EURUSD",PERIOD_M1,59)

For example, right now the value=0.0073, and the line equals 0.0073 for the whole chart, no matter how far back I scroll.

 

Well...

#property indicator_separate_window
#property indicator_buffers 1
#property indicator_color1 Yellow

extern int LookBack=60;
double USD[];

int init()
  {
   SetIndexBuffer(0,USD);
   SetIndexStyle (0,DRAW_LINE,STYLE_SOLID,1);
   return(0);
  }

int start()
    {
    for(int i = Bars-IndicatorCounted(); i >= 0; i--)
        {
       USD[i]=iClose(Symbol(),PERIOD_M1,i)-iOpen(Symbol(),PERIOD_M1,i+LookBack);   
        } 
    return(0);
}
 
phy:

Well...

thanks, Phy

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