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Trend Quality Prism
NewFreeEight regressions as facets coloured by R squared: clean trend vs noise
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
- 2
- Plots
- 17
- Lines of code
- 56
- Source
- presets/analysis/levels/trend_quality_prism.qs
About
Eight linear regressions of price, from `base` bars to eight times longer, drawn as the end points of their fitted lines. The facets between neighbouring regressions are filled and coloured each bar by how well those two windows fit a straight line (mean R squared) on a viridis ramp: dark purple is noise, teal is a usable trend, bright yellow is a clean, linear trend. The order of the facets shows direction: short fits above long fits = rising. Reading: a bright, fanned-out prism with every slope pointing the same way is a trend worth following; the prism collapsing into a dark knot is a range. When the shortest fits cross back through the longer ones while quality is still high, the trend is pausing, not ending. Signals: prism aligned up / down (every slope agrees and quality passes the threshold), and quality lost.
What it draws
Price overlay · counted from the engine's plot table and the script's draw calls
Series
- Line8 visible · 9 helperRegression 1Regression 2Regression 3Regression 4Regression 5Regression 6Regression 7Regression 8
- Band fills (render.band calls)1
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 56-line script (45 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
2 settings in 2 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.
- • 17 plotted series
- • 1 band fill call
- • 3 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
Every regression slopes up and the fits are clean
Every regression slopes down and the fits are clean
Mean R squared fell well below the threshold
Settings
2 settings, grouped as in the chart's settings dialog
| Setting | Type | Default | Range / options | Id |
|---|---|---|---|---|
| Shortest window | Integer | 12 | 4 – 200 | shortest_window |
| Setting | Type | Default | Range / options | Id |
|---|---|---|---|---|
| Quality threshold (R squared) | Number | 0.55 | 0.1 – 0.95, step 0.05 | quality_threshold_r_squared |
Script
packages/quascript/presets/analysis/levels/trend_quality_prism.qs
Header
analysis "Trend Quality Prism" {
overlay = true
render = webgpu
short_title = TQP
precision = 2
}- Total lines
- 56
- Code lines
- 45
- Comment lines
- 10
- Helper functions
- 0
- Loops
- 1
- Persistent variables
- 1
- Higher-interval feeds
- 0
- Engine plots
- 17
Built with
stat.linregstat.r_squaredmath.coalescemath.is_naviz/premium
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