The current bar's volume expressed as a ratio to a recent baseline (typically the 20-bar average), rather than an absolute share or contract count. Computed as Relative Volume = V_current / barV_n, it converts raw volume into a comparable measure across instruments. VSA classifies the ratio into bands—very low (<0.50), low (0.50–0.80), average (0.80–1.20), high (1.20–1.80), very high (1.80–2.50), and ultra-high (>2.50)—so that every volume signal (test, no demand, stopping volume, climax) can be evaluated on a consistent scale.