Hi Paul, paulbochniak
Thanks for your questions.
A downward point arrow means that the Product is on Restock Status and Managed by WC.
This is the formula used: The average sales per day for the last week * Days to reorder.
We calculate the average sales by adding the sales of the product of the last week and dividing by 7.
I'll leave you here a tutorial about Restock Status Formula that might be useful.
It doesn't matter if the products are out of stock, only if they meet the conditions of the formula.
Best regards,
Iryna