I am trying to show a trend by using relative date range of the last 26 weeks. I need help to figure out how I can use the 26 view to split into two views in that graph. One view will show the first 13 weeks and the second view will show the last 13 weeks. Ultimately having a trend between first 13 weeks and second 13 weeks. I have attached a sample of the Superstore dataset. However, I was unable to use relative date range since the data max is Dec of 2017.
Any help achieve this is greatly appreciated.