Hi @newbie9292 ,
Do you want to show the order income from next month? If it is like this, please try following DAX:
Offen_gewichtet betrag = CALCULATE ( SUM ( 'test-dw fact_sellify_master'[Gewichteter Betrag] ),USERELATIONSHIP('test-dw fact_salesforecast_master'[JOIN_ID],'test-dw dim_sellify_verkaufsdetails'[JOIN_ID]),'test-dw dim_sellify_verkaufsdetails'[Status]="Offen",'test-dw dim_date'[Month] = 'test-dw dim_date'[Month]+1)
If I misunderstand your demands, please feel free to contact us in time and had better share with me some data screenshoots of you after hiding sensitive data.
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.