Adjust axis to start with a particular date?
We tend to create a calculated field with a simple "Show/Hide".
Works for us.
IF [Date]=today() THEN "Show" ELSE "Hide" END
Then throw it in the filters.
** We have a couple that use greater than or less than dates as well.
If you are using a table calculation like the below image, which shows the moving average of last 12 months "WINDOW_AVG(SUM([Price]), -12, 0)", you can right click on the pill, choose 'edit table calculation' and choose ' Null if there are not enough values'. this will hide the data points that do not have 12 previous months.
Hope that helps.