convert series back to original value

[mfumagalli68]

Hi blaine, I appreciated your post on medium . I'm working on a similar problem and the approach to model the smoothed moving average time series works pretty well for my data, pointing out some nice seasonality.

My question concern something that you don't mention in your article.
How can i go back to my original data? You applied a normalization and a 21-day moving average. I want to show the predicted vs actual value but in the original scale.

Any advice? Thanks