To complete my analysis of whether EU inventory data tracks Amazon sales, here's the last bits. I'll compare sales rate in the EU data to Amazon sales rank for the last 3 months. We only have good EU inventory data back to early February, but using the rate (units/week) should be ok Sales rates are remarkably similar each week throughout the EU data. I'll also note the number of restocks of each set.
Here we go.
First column is Amazon sales rank, second is EU sales rate in units/week. 3rd column is number of restocks. Sales rate is my eyeball of the data, good to +/- 10 units/week.
DO 9, 500 units/week, 4 restocks
PS 9, no data - 0 inventory throughout
PC 11, 310 units/week, 3 restocks
Tumbler 14, 300 units/week, 0 restocks
PR 32, 250 units/week, 2 restocks
Simpson