Getting high/low in range

[wildfiction]

Is there a better (faster/more efficient) way to get the high value in a range of bars?

function GetHighFromRange(start, len)
{
var retVal;
var highArray = high(-start, -len);

if(highArray.length > 0)
retVal = highArray[0];
else
return null;

for(i=1; i<highArray.length; i++)
{
retVal = Math.max(highArray[i], retVal);
}
return retVal;
}

[ACM]

wildfiction
You could also use the Donchian Channel
Alex

[wildfiction]

Good idea - thanks Alexis