Dynamic Date range Filters on Workspace Report

Currently we do not have any date ranges that are dynamic in nature and can operate on the basis of date selected in Date Filter. I had tried to custom date range which is a rolling monthly date range for last month [say 1 Mar - 31 Mar], the custom date works as current month - 1 month. Now if I set up a date filter on my report for any particular month [say 1 Oct 2018 - 31 Oct 2018], the custom date range range still reflects data for 1 Mar - 31 Mar but I expect the data to be displayed for 1 Sep - 30th Sep (Date selected-1 month). My assumption is any custom date range works on CURRENT DATE and NOT selected date in date filter of report.
Could you create a functionality to change custom date filter to show data based on Date Range selected on Report and NOT CURRENT DATE.