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QuaScript

Regime Probability Ribbon

Admin's Choice NewFree

Bull / neutral / bear probabilities as a stacked ribbon

WebGPU StudioOwn pane WebGPU CanvasHybridGradient fillDashboardSignalsAlerts
quascriptgpuwebgpuregimeprobabilitysizing

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
Own pane
Settings
4
Plots
5
Lines of code
55
Source
presets/analysis/gpu/regime_probability_ribbon.qs
Regime Probability Ribbonengine result
Loading the engine result…
quatick-charts · QuaScript engine on synthetic 1-minute bars · drag to pan · scroll to zoom · Run executes the script on the engine (⌘/Ctrl+Enter while editing)

About

Bull, neutral and bear probabilities as a stacked 100 % ribbon. Three factors are combined: trend (the slope of a regression in ATR per bar), trend quality (R squared of that regression) and order (one minus the Shannon entropy of returns). A softmax turns the scores into probabilities that always add up to 100; each layer is an edge-anchored gradient. Reading: a thick emerald layer = a confident up regime; a growing neutral (slate) layer = the trend is losing quality before it reverses; the dashboard turns the probabilities into an exposure hint (bull minus bear). Signals: regime changes once the new regime passes the confidence level.

5
Plotted series
2
Signal marks
1
Drawings
1
Alert rules
4
Settings
47
Lines of code

What it draws

Own pane · counted from the engine's plot table and the script's draw calls

Series

  • Line2 visible · 2 helper
    Bear shareNeutral share
  • Level1
    Confidence
  • Band fills (render.band calls)3
  • Horizontal levels1
Legend
Bear share Neutral share Confidence

Signal marks

Bull regimeBear regime

Drawings and chart effects

  • Dashboard tables1 created

How it runs

From source to the live chart, for this script

  1. 1
    Compile

    The QuaScript compiler checks the 55-line script (47 lines of code) and lowers it for the native C++ engine. Compile errors point at the exact line and column.

  2. 2
    Place

    The header sets pane = hpane with height = 0.24 (24% of the chart), so the output gets its own pane under the price with its own scale.

  3. 3
    Compute

    The script runs once per bar, oldest to newest. 1 persist variable keeps state (objects, counters) across bars.

  4. 4
    Stay 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.

  5. 5
    Render

    The results are handed to the chart: series on WebGPU, drawings on the Canvas 2D QuaScript layer.

  6. 6
    Tune

    4 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

WebGPUSeries renderer

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.

In this script
  • • 5 plotted series
  • • 3 band fill calls
  • • 1 level
  • • 2 signal mark types

Chosen by render = webgpu in the header.

WebGLNot used

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.

CanvasUsed

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.

In this script
  • • 1 dashboard tables (QuaScript layer)

Alerts

1 alert rule declared with alert.rule

Regime change

A regime passed the confidence level

Settings

4 settings, grouped as in the chart's settings dialog

Factors
SettingTypeDefaultRange / optionsId
Regression windowInteger5010 – 500regression_window
Entropy windowInteger6020 – 1000entropy_window
Model
SettingTypeDefaultRange / optionsId
Softmax temperatureNumber10.2 – 5, step 0.1softmax_temperature
Signals
SettingTypeDefaultRange / optionsId
Confidence (%)Number6040 – 95confidence

Script

packages/quascript/presets/analysis/gpu/regime_probability_ribbon.qs

Header

analysis "Regime Probability Ribbon" {
    pane = hpane
    height = 0.24
    render = webgpu
    short_title = RPR
    precision = 0
}
Total lines
55
Code lines
47
Comment lines
7
Helper functions
0
Loops
0
Persistent variables
1
Higher-interval feeds
0
Engine plots
5

Built with

Technical analysis (ta.*)
ta.atr
Statistics (stat.*)
stat.entropystat.linregstat.r_squared
Math (math.*)
math.coalescemath.expmath.logmath.maxmath.sqrt
Imported modules
viz/premium

Discussion

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