Thank you for your time to read the post. I have some difficulties creating this condition column. This report sample should list all customerIDs and weights shipped by Year/Month.
A condition column should indicates:
1. If current month's weight is blank or zero, then "Has Not Bought"
2. If current month's weight is less than previous month's AND previous month's weight is less than previous month+1's, then "Down 2 Months"
3. If current month's weight is less than previous month's AND previous month's weight is greater than previous month+1's, then "Down 1 Month"
4. Elses are "Good"
The goal is to use this condition column to filter.
It should be like this: