SSAS - Problem&Solution - Get Diference between current and previous row for valid dates

Dear Friends,
I posted a question in Microsoft Forums, and I describe here the solution founded

Problem:
http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1720487&SiteID=1

Solution:

I created a view in database filtering only the valid dates in the table Time.

The datasource view in Analysis Services:

Exploring Data in TIME dimension:

Exploring DATA in CASHFLOW Dimension:

And the named calculation to calculate the difference between current and previous:

And in the brower of the cube:

Please let me know if you think that could be a better solution!

Regards!