Is any chance to calculate a linear regression with TechnicalIndicators?

[ProgrammingLife]

Is any chance to calculate a linear regression with TechnicalIndicators? If not, maybe in the future some time? :)

[alanmacleod]

here's a pretty rough implementation that mimics tradingview's linreg(), you can figure it out from this. I might make a pull request and include my other implementations if I proceed with the technicalindicators package.

// Working, exactly matches pinescript implementation

// time order of series: [t-0, t-1, t-2 ] // reverse for ease of use later
let close = [5609.7, 5655.7, 5749.6].reverse();

close = [25.500000, 26.921875,29.531250].reverse();

console.log(

  linreg(close, 3, 0)

);

function linreg(source, length, offset)
{
  let begin = 0, end = length-1;
  let sumX = 0.0;
  let sumY = 0.0;
  let sumXSqr = 0.0;
  let sumXY = 0.0;

  for (let i=0; i<length; ++i)
  {
    // must calculate across X-axis =>   x-3, x-2, x-1, x = 0
    // hence the quick and dirty reverse() above.

    let val = source[begin+i];
    let per = i + 1;
    sumX += per;
    sumY += val;
    sumXSqr += per * per;
    sumXY += val * per;
  }

  var m = (length*sumXY - sumX*sumY) / (length*sumXSqr - sumX*sumX);
  var b = (sumY/length) - (m*sumX)/length +m ;
  return b + m * (length - 1 - offset);
}