ATR function

[sunman4008]

Hello,

Below is a simple program where I am trying to use ATR9 and ATR26. When I used the print statement, it prints NULL.

What am I doing wrong? I want to use the current value throughout the code. Sometimes, I will reference the atr9 at previous bars too so I need an array.

function main() {
var nNumberBars;
var nIndex = getCurrentBarIndex();

nNumberBars = getNumBars();


if ( (bInit==false) && (nNumberBars != 0) )
{
if (atr9 == null) atr9 = atr(9);
if (atr26 == null) atr26 = atr(26);

debugPrintln("atr9=",atr9.getValue(0));


if ((nIndex==0) && (nNumberBars != 0) )
{
// my function
}


return(currentstrategy+overextension);

}

[SteveH]

This is the pattern you're looking for. Since you need atr26's values too, no need to check atr9 for null returns:

var bInit = false;

var atr9;
var atr26;


function main()
{
  if (bInit == false)
  {
    atr9 = atr(9);
    atr26 = atr(26);
    bInit = true;
  }

  if (atr26 == null) return;

  if (isLastBarOnChart())
  {
     // all historical data has been loaded
  }
}