Display Card with date range from selected slicer

JoeCrozier So let's say you have a single table, you could do this:

Measure = 
  VAR __MaxStatus = MAX('Table'[Status Date])
  VAR __MinStatus = MIN('Table'[Status Date])
  VAR __MaxBlue = MAX('Table'[Blue 'Planned' Visit Date])
  VAR __MinBlue = MIN('Table'[Blue 'Planned' Visit Date])
  VAR __Table = 
    FILTER(
      'Table',
      ( [Status Date] >= __MinStatus && [Status Date] <= __MaxStatus ) &&
      ( [Blue 'Planned' Visit Date] >= __MinBlue && [Blue 'Planned' Visit Date] <= __MaxBlue )
    )
RETURN
  SUMX(__Table,[Value])

Use that in your Card visual. That said, if it is really a single table then it should already filter the cards and you could simply do this:

Measure = SUM('Table'[Value])

or

Measure = SUMX('Table',[Value])

The last Measure has the advantage that you could do a CONCATENATEX for example if you want to return multiple values (because multiple rows are in context).