Cumulative chart showing wrong way around

[nate-kobe]

Hi all,

I'm facing an issue using the "Cumul" modifier in QlikSense. I've used it a lot but in this specific chart, the result is completely wrong. It seems as if the accumulation is happening before sorting the chart by year and month.

As you can see below, if I don't sort the date dimension, it gives a better results. Any idea why? and how to solve it?

Thank you!

Nate