Histogram - Sort order for expression

[Stevenlmgn]

Hello,

I have to create an histogram on my dashboard with dimensions N & N-1 for each month.

When i select both year, my dimensions on histogram aren't sorted. I don't know how to sort this.

I've made a calcul dimension by the way (probabaly sort isn't possible ?)

I have on my chart dimensions sorted by : 2018 june, 2018 nov, 2018 apr, 2019 jan, 2019 feb, 2018 feb etc..

I used to many many expressions, but i don't have what i want.
Take a look of my picture.

Any suggestions ?

Friendly,

Stevenlmgn

PS : Sorry for my english, I really tried my best 🙂 .