Need some help about Rankx

[Kaii]

So I creadted a measure to Rank each ID based on their sales/month by using Rankx.
Now I tried to calculated the difference between each rank? Like Rank2 is 2 less than rank 1, rank 3 is 1 less than rank 2 etc etc?

Thanks in advance

[AbbasG]

https://learn.microsoft.com/en-us/dax/rankx-function-dax

@Kaii refer to the above documentation. Hope it helps.