Grahal.
I will try and experiment.
Maybe the manual is correct as maybe as in my earlier post this is how the calculation is performed:
speed = MOMENTUM[12](malong–mashort)
is calculated as
(malongcurrent – mashortcurrent) -(malong12periodsago-mashort12periodsago)
i.e. PRT looks up the 2 mavs separately twice at 2 different time points before performing the subtraction rather than just subtracting the 2 values straight away in which case it would be correct and work!
