Forecasting DAX

Hello,

We use Line chart with Month in axis and Year in legend and Sales as values. Now I need to do some forecasting logic 

Logic: prior month sales + average % increase for each forecasted month over the last 2 years. 

So if we are in month of May i need to forecast for rest of year. And when we roll over to Jan 2022 it will be for whole year except Jan

Thanks