Selection in Bar Chart

[mnvrma]

By default, I have used Year (2019 and 2018 as variables) in the above Bar-Chart. If I'm selecting the year 2015 from filters- it's showing me 2015 and 2014 data but I want to see 2019 and 2015 data.

How to do that?

[Chanty4u]

what is your variables?

and what is your expressions?  

[mnvrma]

vLastYear         =  Max(Year),

vLastLastYear= Max(Year)-1

Expression:--   Year={$(vLastYear),$(vLastLastYear)}