Dynamic Dimension showing previous weeks data

[#1]

I have a chart that shows some data by week. I want the graph to show the week selected (by default the highest week) and the previous 5 weeks. is there a calculated dimension that can do this?

[Gysbert_Wassenaar]

It's possible to use a calculated dimension, but set analysis expressions usually perform better. Perhaps one of these discussions helps:

Set analysis - show only last 12 weeks data

Set Analysis Last n Weeks

[#3]

The first link is very useful but if I make a selection on my "week" list box then it only shows the current selection - I want the current selections show, and the previous n weeks.....