This is a PineScript translation of Welkin's Advanced Volume Indicator Overlay, originally written for ThinkOrSwim. This tool is designed to facilitate Volume Spread Analysis (VSA) by highlighting areas of above average volume alongside price movement.
This indicator does two things:
1. Plots lines that extend from candles of above average, high, and very high volume.
2. Colors in candles with colors indicating volume levels (when "Paint Candles With Volume Colors" is enabled).
Blue lines mark candles with Average volume, based on a 20 SMA.
Orange lines mark 2-sigma (2 times standard deviations higher) volume.
Magenta lines mark 3-sigma (3 times standard deviations higher) volume.
When enabled, gray colored candles indicate below average volume.
Yellow candles indicate volume that is relatively higher than the previous candle, default is 1.25x.