MDX - Cube Calculated member sliding 12 month comparison with previous month data

SELECT 
[Measures].[Internet Sales Amount] ON COLUMNS,
NON Empty

{
	LastPeriods(
		12, [Date].[Calendar].[Month].[January 2008]
	)
}
 On Rows
FROM
	[Adventure Works];
GO



SELECT 
[Measures].[Internet Sales Amount] ON COLUMNS,
NON Empty

{
	LastPeriods(
		12, [Date].[Calendar].[Month].[February 2008]
	)
}
 On Rows
FROM
	[Adventure Works];
GO

Think BIG but Positive, may be GLOBAL better UNIVERSAL.