Problem mit KPI

[Manuel174102]

Hello, 

So I am showing the amount of sales since 2015.

The thing is, I only want to show the sales since 2017. 

How could I do that?

I tried the following, but it did not work:

=Count({<[Sales_Invoice_Header.Posting Date] > {'01.01.2017'}>} [Sales_Invoice_Header.Order No_])

Greetings,

Manuel

[Manuel174102]

But the KPI does not allow a dimension, I can only write a measure

[JHuis]

Dear Manuel,

An count or Sum is a measure?