tableau api - Reference line date that depends on filter

Question

I have a graph, where you select country and covid restriction. In the data source you can see start_date and end_date of a restriction in given country. How do you create a reference band that shows when the restriction lasted? (if never ended, show the starting date till the most recent date)

question from:https://stackoverflow.com/questions/65927134/reference-line-date-that-depends-on-filter

Answer 1

Waitting for answers