New Customers , Active Customers and lost Customers

[Anonymous]

Hello : 

I have a Sales Table where i have the following fields : 

Date

ClientID

SKU

Sales 

And a date table with mi dates dimentions 

I try to lookup in the forum for this solution , but some are really advanced and i cant understand it 

What i need to do is get the count of customers by month  with this caracteristics :

New customers : are the customers wich NEVER buy a product in the past and now buy something  (from historyc date)

Active Customers : are the customers who as bought anything in the last 3 months 

lost Customers : are the customers who dont buy anything in the last 3 months 

i tried this but i can get the results i need 

Active Customers =

VAR

CustomerList=ALL('Sell Out'[ID])

VAR

ChurnDate = 2

RETURN

COUNTROWS(

FILTER(

CustomerList,

CALCULATE(COUNTROWS('Sell Out'),

FILTER(ALLSELECTED('Calendar'),

'Calendar'[Month]>(MIN('Calendar'[Month])-ChurnDate)&&'Calendar'[Month]<MIN('Calendar'[Month])))=0))

[amitchandak]

@Anonymous , a small modification in the measure from this blogs can help.

please check

Customer Retention Part 1:
https://community.powerbi.com/t5/Community-Blog/Customer-Retention-Part-1-Month-on-Month-Retention/ba-p/1361529
Customer Retention Part 2: Period over Period Retention :https://community.powerbi.com/t5/Community-Blog/Customer-Retention-Part-2-Period-over-Period-Retention/ba-p/1377458

[Anonymous]

Thanks , but i dont understand how to avoid the filter you use to compare current month and past month 

What i need to archieve is to know hoy many new customers i have in each month who never bought in the past