How to calculate at the lowest level if a measure, per dimension, has changed across a dynamic period?

I am using the below for opening calc:

IF {INCLUDE :MIN([PERIOD_ID])} = [PERIOD_ID] then [MEASURE] END

and this for closing calc:

IF {INCLUDE :MAX([PERIOD_ID])} = [PERIOD_ID] then [MEASURE] END

However I want to assign a bool at the lowest level, every category depending on what period I select, whether or not the opening measure is different to the closing measure?

So for one period ID they would be the same, but the more periods I filter for that bool would change.

For example if you had a list of stores, I want to filter for all the stores whose space has/has not changed across the period selected

Please help