Thanks a lot Lutz.

It works like a charm.

Appreciate your effort.

If I may I have another question:

The average shall be calculated like this:

1. for every day in the last 30 days: calculate the differences between adjecent values (adjecent in time) and make avarage of these differences.

2. get every day's calculated avarage from step 1 and make average of the 30 days.

What shall I change in the script of yours to do that ?

I appreciate your effort !!! Thanks a lot 🙂 🙂