Qlikview: Rolling! Help me!

[qlikviewaf]

Hello!!!!

I have this table below and i would like to add the expression highlighted in red.

The "rolling" row, should take the value from "ALM On Hand" (that is just on a single period) and then add the Delta of each month to get the balance. How this can be done?

i created a sample where i'm not able to aggregate.. 

THank you!!

[Chanty4u]

May be this

Above(Sum([ALM On Hand])) + Sum([Delta])

[qlikviewaf]

not working