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Liquidity Pressure Waves
NewFreeVolume-weighted buy / sell pressure waves with absorption and divergences
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
- Placement
- Own pane
- Settings
- 5
- Plots
- 6
- Lines of code
- 49
- Source
- presets/analysis/gpu/liquidity_pressure.qs
About
Where each bar closed inside its range, weighted by its volume, splits the bar into buying and selling pressure. The net pressure is shown on three horizons: per-bar columns (shaded by relative volume), a fast wave and a slow tide, each normalised by the volume of the same horizon so the whole pane reads in percent of volume. The cloud between the wave and the tide takes the side that is winning. Absorption marks bars with heavy volume, a small range and pressure against the bar's own direction: someone large is soaking up the other side. Divergences compare the tide with price.
What it draws
Own pane · counted from the engine's plot table and the script's draw calls
Series
- Line2 visible · 2 helperZeroTide
- Histogram1Bar pressure
- Spline1Wave
- Band fills (render.band calls)2
Signal marks
Drawings and chart effects
No drawings; everything is plotted series.
How it runs
From source to the live chart, for this script
- 1Compile
The QuaScript compiler checks the 49-line script (37 lines of code) and lowers it for the native C++ engine. Compile errors point at the exact line and column.
- 2Place
The header sets
pane = hpanewithheight = 0.28(28% of the chart), so the output gets its own pane under the price with its own scale. - 3Compute
The script runs once per bar, oldest to newest.
- 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.
- 6Tune
5 settings in 2 groups appear in the chart's settings dialog. Changing one reruns the engine with the new value.
Rendering
This script draws on WebGPU
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.
- • 6 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.
Alerts
2 alert rules declared with alert.rule
Heavy volume, small range and pressure against the bar
The tide diverges from price at a confirmed pivot
Settings
5 settings, grouped as in the chart's settings dialog
| Setting | Type | Default | Range / options | Id |
|---|---|---|---|---|
| Wave length | Integer | 8 | 2 – 100 | wave_length |
| Tide length | Integer | 34 | 5 – 400 | tide_length |
| Setting | Type | Default | Range / options | Id |
|---|---|---|---|---|
| Relative volume window | Integer | 50 | 5 – 500 | relative_volume_window |
| Absorption volume (x average) | Number | 1.8 | 1 – 10, step 0.1 | absorption_volume_x_average |
| Absorption range (x ATR) | Number | 0.7 | 0.1 – 2, step 0.05 | absorption_range_x_atr |
Script
packages/quascript/presets/analysis/gpu/liquidity_pressure.qs
Header
analysis "Liquidity Pressure Waves" {
pane = hpane
height = 0.28
render = webgpu
}- Total lines
- 49
- Code lines
- 37
- Comment lines
- 7
- Helper functions
- 0
- Loops
- 0
- Persistent variables
- 0
- Higher-interval feeds
- 0
- Engine plots
- 6
Built with
ta.atrta.divergenceta.emata.smamath.clampmath.max
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