Slicer reverse selection in chart

Hi afaque03,

In your scenario, please create another table (Table2) contains the column Year value, assume the sample data like below:

Make sure there is no relationship between these two tables.

Then create a measure within Table2 like below:

Select Value = IF(HASONEVALUE(Table2[Year]),VALUES('Table2'[Year]),BLANK())

Create a measure in Table1 like below:

Total = CALCULATE(SUM(Table1[Sales]),FILTER('Table1','Table1'[Year]<>'Table2'[Select Value]))

Then place the Year column from Table2 in a slicer visual, Place measure 'Total' as line chart value. See:

Best Regards,
Qiuyun Yu