Hi Maria ,
As your interest rate data have null values ,so Instead of drilling your report to date keep it at year .
All you want is to compare inflation and interest rate , so can do it on year level as well .
Everything is same (but you should synchronize your dual axis chart in order to compare them )
Select year instead of day .
Hi, this doesn't work because I want the exact values, not the "sum" or "average" which would provide me the incorrect picture.