Count the values of the next seven days

[Applicable88]

Hello,

I'm using autocalendar in a bar-chart.

Since I have values over a period of 3 years I got all data counts.

But I only want to display the Ordernumbers between today and the next seven days. 

I'm using that with a date picker and always have to manually set the range in that.

count(distinct {<Workstation={'3210D111'}>}Ordernumber)

Can I also display that fixed via set analysis? 

Date format for dates are standard [EndOrder.autoCalendar.Date]

2nd question:

If I want to stay using it with my date picker. Is there a way to always set range of next seven days automatically?

Thanks in advance.