Moving Average Forecast

Hello all!!

Iu2019m using moving average forecast, I have 21 weeks of historic values, and I want to get the forecast values from the week 22 to the week 52; but I got the same values for those weeks. This method took the last 9 weeks (which is my moving order).

I knew that at the end of the original data values, the last average value serves as the first forecast value, so this method must consider forecast values for the calculation of the moving average. That means in this case, that after 9 weeks the forecast is purely based on previous forecast values.

Any suggestion??

Thanks in advance!