This product reached the end of support date on March 31, 2021.
08 Dec 2016
Refer the attachment.
How to calculate the "expected range"?
Use the average? max value? min value?
09 Dec 2016
If I understood correctly your question, you don't need to bother on how to calculate "expected range". Dynatrace does it for you based on the historical data as described right after your marking.
Is this what are you asking!?