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Intradayscanner - Rvol

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This indicator delivers a session-precise Relative Volume (RVol) metric using an advanced, performance-optimized method that goes beyond standard volume-vs-average calculations:

Session-Aligned Cumulative Volume

Tracks intraday volume from each session’s true open using a rolling array of session start bar indices.
Prunes old sessions to maintain high performance even on long history (max_bars_back=5000).

Binary-Search History Lookup

Employs a binary-search algorithm to find the exact bar corresponding to each prior session’s close, accounting for weekends/holidays.
Ensures the N-day average is built from perfectly aligned session volumes rather than simple bar-counts.

Configurable Threshold & Coloring

Computes RVol = (today’s cumulative volume) ÷ (N-day average cumulative volume).
Highlights high-volume conditions when RVol exceeds a user-defined threshold (High Volume Threshold).
Optional line-coloring by price direction (up/down) for immediate visual context.

Background Shading for Volume Spikes

Applies semi-transparent colored backgrounds when RVol > 1 (and above the threshold), making significant volume surges unmissable.

Customizable Lookback & Precision

User inputs for N-day average length, threshold multiplier, and color-by-previous-close toggle.
Designed for up to 5000 bars of history without performance degradation.

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