Module 06 · Promotions & Product History · 06B
Trend & Volatility Lab
Which rivals move prices often, and by how much?
Try this
- 1Compare Saffron & Sage (stable) vs Velvet Orchard (discounter)
- Expected: Volatility bars and change-point counts differ clearly; sample size is shown.
vs
Saffron & Sage stable
Change frequency
26.0%Avg magnitude
20.7%Sample
200item-weeks
Velvet Orchard discounter
Change frequency
36.0%Avg magnitude
22.1%Sample
200item-weeks
26-week price-event stream · effective price per 100ml (mist, 8 items each)
Rival trajectories vs Aurelia brand SPI
Promo-frequency heatmap · price changes per week
Seasonality
Saffron & Sage
Velvet Orchard
A price move = same listing, different price week-on-week. An assortment change (new/delisted items) shifts averages without any price move — PricePulse tracks them separately so SPI is not distorted by catalogue churn.