Collection health
3,146 category pages discovered · 3,151 requests · 52.8 minutes · 1 recorded non-fatal source issue(s).
Catalog size over time
Successful snapshots only. Missing observations are not interpolated.
Largest increases
Highest percentage changes among matched products.
Largest decreases
Lowest percentage changes among matched products.
Robust anomaly review
Only changes of at least 20% with an absolute MAD-based robust z-score of at least 3.5.
Largest categories
Category membership is retained when products appear on multiple pages.
Largest brands
Brand values come directly from public structured product data.
Weekly-ad promotions
Best-effort, separately sourced advertised offers.
Volatility
Four- and eight-week log-price volatility begins only after enough successful history exists.