Track competitive position by dollar-value market share (e.g., via a market-share tracking tool) rather than by unit-based Best Seller Rank alone, because price differences between competitors can make a seller's real market share look much bigger or smaller than unit counts alone suggest.
A seller selling fewer units at a much higher price point can hold a larger dollar share than a higher-unit-count, lower-price competitor — and vice versa. Relying on unit rank or CPR (Units to Rank) Metric-style thinking alone can misidentify who the 'real' competitors are. This realization directly reshaped which sellers this seller considers his true competitive set, feeding into how he applies Tiered Rank-Climbing Competitor Definition. Distinct from Helium 10 Market Tracker 360 (Serviceable Obtainable Market Sizing), which sizes the total addressable/obtainable market rather than tracking relative share by dollar value over time.
Switching from unit-based rank tracking (BSR, units sold) to dollar-value market-share tracking changed one seller's own understanding of who his real competitors were: some sellers he assumed were rivals turned out not to be once price differences were accounted for, while other, overlooked sellers turned out to be bigger threats by revenue.
Apply: re-run competitor identification through a dollar-value lens periodically — the competitor set implied by unit-based rank and the competitor set implied by revenue share can genuinely diverge, especially when prices differ meaningfully across the category.
Из тем: Product Research & Validation