Excluding data from visual based on date range

Hello,

I have a some measuyres which calculates the moving average of a sum of values in my table each day in a specified year (related to a date table), but when I move the date filter, I get a static line for values outside of my date range.

My goal here is to be able to have another measure which is the average on each day for all the years selected, but excluding the periods filtered out.

I know that if I simplify this into one measure which is not filtered by year I can get something like the below, but then from what I understand I am then not able to create an average line of all the years to display on the same chart.

Does anyone know how I can exclude those those static values in the fisrt picture (i.e. treat them as blank/null) so that I can achieve the result in the second picture AND be able to show an average line on top of that?

Hope is clear, many thanks!