The solution is just to create a dual axis using the measure %DiffMonvingAverage, syncronize both axis and remove the dimension Regione from Color. I highlighted in black and increased the size of the line for Total of the region in order you see it immediately in the chart.
Take a look at your own workbook edited by me with solution.
tableaurequest_RM.twbx.zip 89.9 KB
very fast and easy!! :-)