Can you please attach the .twbx file.
It seems simple, but Tableau basically show the data which exists.
If you don't have any "Date" beyond today, it requires some workaround to draw future date on axis.
Here is one idea.
Specify selected year.
Create dummy date of end(December) of selected year.
Add dummy date to detail sehelf
Add reference line only for the purpose of expanding the axis range.
Change year filter to context for LOD work after filtering
Linechart_SM_10.3.twbx 7.8 KB
Thank you Shin and Navya for responses. I think the later solution is quite simple and that's what I am looking for. Thank you both.