Hi,

It certainly would use if I were to enter a single value column.

The complete cycle involves the following calculations for each step in the column:

=SOMMA(E3:E14) 'Entry with the previous example
=SOMMA(F3:F14)*-1
=(L3/L4)
'
=SOMMA(E4:E15)
=SOMMA(F4:F15)*-1
=SOMMA(L7/L8)
'
=SOMMA(E5:E16)
=SOMMA(F5:F16)*-1
=SOMMA(L11/L12)
'

Completing the first cycle resume the calculation sequence
I'm not sure what cycle is best to use in this case
The paper uses 300.000 rows of data