diff --git a/price-trends/README.md b/price-trends/README.md
index 064128b..2ef8e67 100644
--- a/price-trends/README.md
+++ b/price-trends/README.md
@@ -6,6 +6,8 @@ Monthly median price-per-terabyte for current 8TB+ NAS hard drives (US, new, in
 >
 > Part of the open [NAS drive dataset](https://github.com/deeddy/nas-drive-data), maintained at **[nasdisks.com](https://www.nasdisks.com/)**.
 
+The chart below tracks both tiers from Jul 2024 to the latest month: flat for over a year, then a supply-driven near-doubling from late 2025. The monthly medians it plots are in [`monthly-median-per-tb.csv`](monthly-median-per-tb.csv).
+
 ![Median dollars per TB, consumer NAS vs enterprise](nas-price-trend.png)
 
 ## The trend