sales amount for 90 days and one year (Date)

[johny.cbi]

Combination Chart report  (Moving Average Sales Amount)

I've a report for 90 days moving average Sales amount

on X-Axis there is date and on Y-Axis  Sales Amount

my question is

on X-Axis the dates were displaying for 90 days (90 days dates)

I want the date for one year and the average for 90 days on X-Axis


Thanks for the suggestions