We are now ready to create our Sales Forecast measure:

Sales Forecast = 
[Sales Forecast - Seasonality] + [Sales Forecast - Trend]

Actualized Forecasted Revenue measure is meant to display actual values for data points where we have history and forecast for data points in the future

Actualized Forecasted Revenue = 
var _sales = [Revenue]
RETURN IF(_sales<>0, _sales, [Sales Forecast])