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Volatility Aurora
Admin's Choice NewFreeSix ranked-volatility curtains that glow from violet calm to gold extremes
Favourites and Admin's Choice analyses are listed in the terminal's indicators window under Analysis Marketplace.
- Language
- QuaScript
- Engine
- Native C++, incremental on live ticks
- Rendering
- WebGPU + Canvas
- Placement
- Price overlay
- Settings
- 7
- Plots
- 27
- Lines of code
- 67
- Source
- presets/analysis/gpu/volatility_aurora.qs
About
Six curtains of volatility around a two-pole smoothed price. Each curtain is one ATR multiple wider than the one inside it, and every curtain is coloured each bar by where today's volatility ranks against its own history: deep violet when the market is unusually quiet, through magenta and orange to pale gold when volatility is extreme. The outer curtains fade, so the cloud reads as a glow that tightens and flares. Reading: a thin violet aurora is stored energy; the first bar that closes outside the second curtain while the colour warms is an ignition, usually in the direction of the close. Gold curtains mean risk is expensive: widen stops or reduce size. Signals: compression (rank below the quiet level), ignition up / down out of a recent compression, and extreme volatility.
What it draws
Price overlay · counted from the engine's plot table and the script's draw calls
Series
- Line1 visible · 26 helperCentre
- Band fills (render.band calls)2
Signal marks
Drawings and chart effects
- Dashboard tables1 created
How it runs
From source to the live chart, for this script
- 1Compile
The QuaScript compiler checks the 67-line script (57 lines of code) and lowers it for the native C++ engine. Compile errors point at the exact line and column.
- 2Place
The header sets
overlay = true, so everything is drawn on the price chart, on the same scale as the candles. - 3Compute
The script runs once per bar, oldest to newest. Each bar also runs one loop (1 for). 1
persistvariable keeps state (objects, counters) across bars. - 4Stay live
On the terminal the script keeps one live engine session: a tick rolls the forming bar back to its checkpoint and re-executes only that bar, and new bars are appended, so history is never rerun while the market moves. The live result is identical to a full run.
- 5Render
The results are handed to the chart: series on WebGPU, drawings on the Canvas 2D QuaScript layer.
- 6Tune
7 settings in 3 groups appear in the chart's settings dialog. Changing one reruns the engine with the new value.
Rendering
Hybrid: this script draws on 2 surfaces at once
The browser's modern GPU API. The chart uploads every line, band and mark of the script as GPU buffers and draws them in one pass, so dense heatmaps and dozens of series stay smooth while you pan and zoom. Without WebGPU support the chart's GPU layer falls back to WebGL 2, then Canvas 2D.
- • 27 plotted series
- • 2 band fill calls
- • 4 signal mark types
Chosen by render = webgpu in the header.
GPU drawing through WebGL 2, available in every current browser. Used for chart-native profiles and for series that ask for it with backend = "webgl". Fast for large numbers of bars and wide fills.
The browser's 2D drawing API. Text-heavy and object-style output (dashboard tables, zones, tags, segments), candle colors and backgrounds are painted by the QuaScript layer, a Canvas 2D surface over the chart. Series use Canvas when the script's header does not ask for a GPU.
- • 1 dashboard tables (QuaScript layer)
Alerts
3 alert rules declared with alert.rule
Close left a recent compression through the upper curtain
Close left a recent compression through the lower curtain
Volatility rank passed the extreme level
Settings
7 settings, grouped as in the chart's settings dialog
| Setting | Type | Default | Range / options | Id |
|---|---|---|---|---|
| Centre smoothing | Integer | 34 | 5 – 400 | centre_smoothing |
| ATR length | Integer | 20 | 2 – 400 | atr_length |
| Curtain spacing (ATR) | Number | 0.6 | 0.1 – 3, step 0.05 | curtain_spacing_atr |
| Setting | Type | Default | Range / options | Id |
|---|---|---|---|---|
| Volatility rank window | Integer | 250 | 30 – 5000 | volatility_rank_window |
| Quiet rank (%) | Number | 15 | 1 – 50 | quiet_rank |
| Extreme rank (%) | Number | 90 | 50 – 99 | extreme_rank |
| Setting | Type | Default | Range / options | Id |
|---|---|---|---|---|
| Compression memory (bars) | Integer | 20 | 2 – 200 | compression_memory_bars |
Script
packages/quascript/presets/analysis/gpu/volatility_aurora.qs
Header
analysis "Volatility Aurora" {
overlay = true
render = webgpu
short_title = AUR
precision = 2
}- Total lines
- 67
- Code lines
- 57
- Comment lines
- 9
- Helper functions
- 0
- Loops
- 1
- Persistent variables
- 1
- Higher-interval feeds
- 0
- Engine plots
- 27
Built with
ta.atrta.bars_sinceta.super_smootherstat.percent_rankmath.coalescemath.is_namath.maxviz/premium
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