Porting from Pine Script

Hyperprop Script runs your whole calculation once per update instead of once per bar. Pine’s per-bar drawing changes (create, move, delete) collapse into one question: what should be visible right now? Compute that final state once and return it.

Pine	Hyperprop Script
`input.int(14, "Length")`	`input.int('Length', 14, { min, max })`
`ta.sma / ema / rma / stdev / atr / rsi / linreg`	`hp.` equivalents. Note `hp.atr(bars, length)`.
`ta.pivothigh(high, l, r)`	`hp.pivothigh(highs, l, r)`. Value at the pivot bar, not the confirmation bar.
`ta.crossover / crossunder`	`hp.crossover / crossunder`, returning `boolean[]`
`close[3]`	`closes[i - 3]` inside your own loop
`var x = …` with per-bar updates	a sequential `for` loop over bars inside `compute`
`plot(..., style=plot.style_histogram)`	`{ values, style: 'histogram' }`
`box.new / label.new / line.new`	push to `boxes` / `labels` / `lines`
`plotshape`	push to `markers`
`bgcolor` and session boxes	push to `bg`
`fill(p1, p2)`	not supported. Plot both boundaries, or use per-segment boxes.
`plotcandle` / `barcolor`	not supported
`request.security(sym, "D", close)`	`const d = request.bars('1D', { symbol })` at the top level, then `d.close` or `d.align(series)`
`lookahead_on` / the developing bar	`request.bars(tf, { developing: true })`
`table.new(position.top_right, …)`	return `tables: [{ position: 'top-right', cells }]`
`table.cell(..., text_halign=text.align_center)`	cell `{ text, align: 'center' }`, or `align` on the table
`syminfo.mintick` / `syminfo.pointvalue`	`chart.tickSize` / `chart.pointValue`
`timeframe.period`	`chart.timeframe`
`alertcondition`	not supported. Price alerts are a separate terminal feature.
`xloc.bar_time` timestamps	bar indices. Use indices past the last bar for future x.

Example: previous day’s close

Pine:

dailyClose = request.security(syminfo.tickerid, "D", close[1], lookahead=barmerge.lookahead_on)
plot(dailyClose)

Hyperprop Script:

const daily = request.bars('D');

function compute() {
  if (daily.status !== 'ready') return { plots: [] };
  return { plots: [{ title: 'Prev daily close', values: daily.close }] };
}

By default, each chart bar sees the last closed daily bar, so this already gives the previous day’s close without lookahead. See Other timeframes.

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Example: previous day’s close

​Example: previous day’s close

Example: previous day’s close