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This study displays Volume per bar. Let \(C_t\) be the value of the Close Price at Index \(t\).

A Volume bar is colored the Volume Subgraph Primary color (green by default) if \(C_{t - 1} \leq C_t\).

A Volume bar is colored the Volume Subgraph Secondary color (red by default) if \(C_{t - 1} > C_t\).

If you want a Volume bar colored the same as the chart bars, then do not use this study. Instead use the Volume study and set the Subgraph >> Auto Coloring setting for that study to Same as Base Graph.