Pivot Table with YoY growth

[Anonymous]

Hello, Im looking for make a new Column in a pivot table with one dimesion (the dimension is Date (2017-01 to 2018-06) , and i have 5 expresion (sales, incomes, expenses; etc).... I good like to compare the expresion in two selected dates...

The dates are on the columns , example..... 2017-05 & 208-05 and in the rows are the expresion...

so i need i new column with de comparasion percentage...

Also make a waterfallchart with the date selected

I would appreciate your recommendations