show/display every month in chart

[#1]

Hi guys,

How can I show every month in chart ?

I have a month chart with sum(amount) expression..

but it only shows up the month where an amount was made. the month without an amount, it doenst display/show up.

Is it possible to show all the Month that I've "selected"?

What about the rolling month? It also shows only the month where exist an amount.

Ive tried with the settings in chartsm to unselect and select show all values ...

but I still dont get it.

Is there for a simply trick/way to show this?, Ive also tried with

If(sum(amont=0), amount+0,01,sum(amount)

hope you guys can help  me

[#2]

do you mean the rolling month?

[#3]

I updated the file.