I downloaded the Troi Number Plug-in, and I am able to do running totals in a portal (see my previous post http://www.fmforums.com/threads/showflat.php?Cat=&Board=UBB11&Number=54050&PHPSESSID=&fpart=1#Post54050 )

But I want to be able to calculate based on the running total

ie, my portal will look like

ID  Value   To   From

1   2       0    2

2   3       2    5

3   1       5    6

the troi plugin does the from just fine, but i need to be able to calculate the To

ideas?

oops. it appears that one CAN do calculations using the field, but only in the file it was defined in, not a relationship.