Custom indicators

const length = input.int('Length', 20, { min: 1, max: 500 });
const color  = input.color('Line color', '#f59e0b');

function compute(bars, inputs, hp) {
  const closes = bars.map(b => b.c);
  return {
    plots: [{ title: 'SMA', values: hp.sma(closes, length), color }],
  };
}

// Top level: declare settings and any other timeframes the script needs.
const length = input.int('Length', 14, { min: 1, max: 500 });
const daily  = request.bars('1D');

// Called on every data change with the full series.
function compute(bars, inputs, hp, chart) {
  return {
    plots: [],      // required, may be empty
    boxes: [], labels: [], lines: [], markers: [], bg: [], tables: [], // optional
    range: { min: 0, max: 100 },  // optional: fix a separate pane's scale
    guides: [30, 70],             // optional: dashed horizontal levels
    decimals: 2,                  // optional: axis and legend precision
  };
}