Recursion in DAX

Hi team,

I have a DAX measure (not calculated column) that calculates monthly KPI, and needs to refer to it's previous months' result to get current month number.

It's like something below:

I already have a DAX measure to calculate X = x1, x2, x3, ... (for each month)

Current month X = CALCULATE(SUMX(MyTable, [X]))

Cumulative X = 
var ThisMonth = SELECTEDVALUE(MyCalendar[Month])
return CALCULATE(SUMX(MyTable, [Current month X]), All(MyCalendar), MyCalendar[Month] <= ThisMonth))

However, for Y, it's calculated based on

[Current month Y] = [Current month's cumulative X] - [Previous month's cumulative Y]

where [Previous month's cumulative Y] is the sum of [Current month Y] for every month until previous month

This is causing a circular dependency in my DAX measure:

Current month Y = 
CALCULATE(SUMX(MyTable, [Cumulative X] - [Cumulative Y (last month)]))

Cumulative Y (last month) = 
var ThisMonth = SELECTEDVALUE(MyCalendar[Month])
var LastMonth = EDATE(ThisMonth, -1)
return CALCULATE(SUMX(MyTable, [Current month Y]), All(MyCalendar), MyCalendar[Month] <= LastMonth))

I saw some post saying that DAX cannot do recursively self-reference, and I also cannot write table to store the previous month's calculation result as I need the calculation to be on-the-fly.

Any tips or workaround idea would be very much appreciated! Thank you!