Bar Chart's Dimension show only this year and previous year

[JoshPark]

Hi everyone, 

I'm making a bar chart with (name of data field): 
- 2 dimensions: Month ([Date.autoCalendar.Month]) -> Year ([Date.autoCalendar.Year]); 
- 1 measure: Actual Sales ([Sales]) 

So far, the chart looks like this: 

However I would like to show only 2 bars of this year and last year. 

I have researched some solutions on the forum and tried to follow, but it seems not working for my case. 

Here are some examples of expressions I tried for the measure [Sales]: 

Source: https://community.qlik.com/t5/App-Development/Showing-only-this-year-and-the-previous-of-four-years/...

Sum ({$<Year={">=$(=max(Year)-1)"}>} Sales)

 Result (if follow directly, it still shows all): 

Sum ({$<[Date.autoCalendar.Year]={">=$(=max(Year)-1)"}>} [Sales])

Result: 

Sum ({$<[Date.autoCalendar.Year]={">=$(=max(Date.autoCalendar.Year)-1)"}>} Sales)

Result: 

Can anyone help to guide me where have I done wrong and how to fix it?

[JoshPark · Accepted solution]

I think I got one solution to use Set Analysis with OR condition applied to YearsAgo field: 

Sum ({< [Date.autoCalendar.YearsAgo]={'0'}> + <[Date.autoCalendar.YearsAgo]={'1'} >} Sales)