The expected value shows an "indication of expected activity for this time and day".

What does "this time and day" mean?

If I'm looking at stats for the past 7 days, is this the expected value for a typical day of the week (let's say Monday), or it's derived from some heuristic function to include all 7 days data?

When I change the view to the 60 day duration, is the expected value going to average out based on the past 60 days instead, or still 7 days, or of all time?