A sum of adjacent and previous value

[Anonymous]

A task very simple to do in Excel, but in Power BI I am strauggling. 
I have a table, which looks like this:

The green are columns within the table: [Date] and [Budget].
Blue are measures: [Won] is a sum of values from a different table, [Difference] substracts [Budget] from [Won]
I need help with writing a measure [YTD], which will achieve what you can see in the picture: A cumulative sum of prevoius month's [YTD] and this moth's [Difference]. How can this be achieved?
EDIT:
Thanks to @Greg_Deckler help, I have almost got what I am after. Next step is, I don't want this measure to "reset" every year. I want it to continue and carry the december value over to next year.

[Greg_Deckler]

@Anonymous - Try right clicking your Budget column in report view and then choose "New quick measure". Choose the "Year to date Total" under Time Intelligence.

You may find this helpful - https://community.powerbi.com/t5/Community-Blog/To-bleep-With-Time-Intelligence/ba-p/1260000

Also, see if my Time Intelligence the Hard Way provides a different way of accomplishing what you are going for.

https://community.powerbi.com/t5/Quick-Measures-Gallery/Time-Intelligence-quot-The-Hard-Way-quot-TITHW/m-p/434008

[Anonymous]

Thanks @Greg_Deckler , but that's a cumulative sum of the budget. If I'm looking for a cumulative sum of [Difference], then I should just do the same with the [Difference] measure?
EDIT:
I did this and it kind of worked. Until This year January:

[amitchandak]

@Anonymous , You have take MOM diff YTD till previous month diff

example

MTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESMTD('Date'[Date]))
last MTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESMTD(dateadd('Date'[Date],-1,MONTH)))

diff = [MTD Sales]-[last MTD Sales]
diff % = divide([MTD Sales]-[last MTD Sales],[last MTD Sales])

YTD this month vs last month diff should be same as MTD and last MTD 

[Anonymous]

Thanks for your reply. Can you please explain what "MOM" means?

[amitchandak]

Month on Month

[Anonymous]

I've done what you sai, and this is what I get:

MTD diff = CALCULATE([Difference],DATESMTD('Sales Budget'[Date]))

Last MTD diff = CALCULATE([Difference],DATESMTD(dateadd('Sales Budget'[Date],-1,MONTH)))

diff = [MTD diff] - [Last MTD diff]