Create a quick measure that enables past 4, 12, 26, 52 week % change vs previous year
The idea would be create simplified rolling time period measures to enable trended analysis.
Jesper Sommer commented
Just remember that "week" is not the same all around the globe. The US observes it's own special standard while most of the world uses ISO 8601. Generally, calculating weeks isn't so easy, and aggregating data with added weeks numbers is something that should be considered carefully. I'd like to have a quick measure as well, but don't throw one together in 30 minutes and call it a day. Make sure it works for non-US customers, that it aggregates data correctly at year change, and that week start is configurable (since most of the world outside the US uses Monday as week start).