SAP CRM - Segmentation - Dynamic filter using system date

We are currenlty using HVS ( with TREX) for HVS and we tried to use
CRM_MKTTG_BP_BIRTH_HV infoset to use dynamic dates as source, but this
means we would need to refresh our index on a daily basis that would
add extra time for business to have date for search and also add more
processing to the trex updates ( and I also believe risk for business
to not have data available when required). We would like to enable the
functionality to the segmentation model to allow business ( users) to
determine the Date filters using system date + number of days to be
selected on the counter ( similar to using variants in a normal abap
report with a dynamic variant). I looked the BADIs available in
configuration and there is no one for the selection only on the Target
group that is to late for the Marketing group to see the counter and
determine if they would like to create the target groups.