You haven't told us what your standard filter looks like, so here is a solution using an integer parameter [Last N days]:
Create two calculated fields:
countd(IF [Order Date]>=DATEADD('day', -[Last N days],today()) AND [Order Date]<=today() THEN [Order ID] END )
countd(IF [Ship Date]>=DATEADD('day', -[Last N days],today()) AND [Ship Date]<=today() THEN [Order ID] END )
They would need to be used on a worksheet were you don't use a filter for Order Date or Ship Date though as otherwise they will be affected by these filters.
If they need to be on a worksheet with one of those two filters then you could try placing them in a fixed expression.
Thanks Eva for the reply,
As already mentioned, our standard filter is relative date filter. Please find below snapshot
By using parameters, there is no way of having the relative filter as per above screenshot.
Can we implement the same functionality with have relative date filter on our dashboard.