past and future velocity in rdf

Hi All,

I'm newbie to RDF and using version 14.1.

I was trying to jot down past and future velocity formulas as per the config guide.

in calculating past and future velocity for STD ES config guide says of tf and tl time series.

for a certain point for calculation, like below to correct 6 and my np=nf=5

1  2  3  4  5  6  7  8  9  0  3

for doing past Velocity

if i=1 SRC(tf -1) = 2 (as per the above data) ? so tf starts from 1 for past velocity ?

similarly if i=1 SRC(tf -1) = 0 (as per the above data) ? so tl starts from 3 for past velocity ?

Also the denominator for LSOVER calculation would be what as it says tl -tf +2.