Using cummulated sum and loops in Power BI

[LSatPD]

Hi,

I'm new to DAX and I need a measure (or a calculated column) that would accumulate a sum within a loop of days.

My problem is quite simple: I have 5 minuts increments readings of rainfall. 
I want to plot the daily cumulative rainfall. 

As I said, I am very new to DAX and I can't figure it out.

What I have here is an hourly filter that shows me the fist day correctly, but after that, it carries the hourly values to the next days. (The green line indicates if there has been rain or not)

[Anonymous]

@LSatPD  - It appears that ALLSELECTED function is causing all of the days to be considered. I think that instead of ALLSELECTED(LTU_Rain_Date), you could use ALL(LTU_Rain_Date[Time_Hour]). So instead of considering all days, you consider all hours and then limit hours to only the current hour or prior.

Also, it is preferable to store MAX(LTU_Rain_Date[Time_Hour]) in a variable and then use it.

var current_hour = MAX(LTU_Rain_Date[Time_Hour])
return CALCULATE(........LTU_Rain_Date[Time_Hour] < current_hour.....)

I hope this helps. If it does, please Mark as a solution.
I also appreciate Kudos.