I am trying to count the current consecutive weeks an item is below its average for a given period of time starting with the past week. Not sure how to do this. Item 123 should have an output of 3 since it has been below the average the past 3 weeks. Item 1234 should have an output of 0 since it was above the average last week.
|Item||10/20||10/27||11/3||11/10||Avg||Consecutive WK Below Avg|