Turnover for a Certain Period

Summary: Is it possible to report on period start headcount and period end headcount for anytime period instead of month start and month end from the Workforce Trend Real Time Subject Area.

On the dashboard I am trying to show data as of last 12 months from the As of Date. i.e if I give a month end 30-Jun-2021 then start date should be 01-Jul-2020 similarly if I input 8-Nov-2021 then the data needs to go back to 9-Nov-2020.

I am trying to get the headcount for period between "Time"."Date" between TIMESTAMPADD(SQL_TSI_DAY,-364,@{asofdate}{CURRENT_DATE}) and @{asofdate}{CURRENT_DATE} and it is not pulling any result in the trend subject area.