[malaguti]

Yes that's my issue, which one Stan uses ? and what kind of weighted MA is it on the Mansfield charts ?

he makes it pretty clear in his book
on page 25 he says that he was using the mansfield charts, which didn't have what we know as the simple moving average. he didn't have it, he had to use what the mansfield chart had which was weighted. so he's explaining to us why his charts are using a 30week weighted because on page 13 he has very clearly stated that he has found over the years that a 30week average is best for long term investors and 10 for traders using the simple moving average

so just to be as clear as I can he is recommending the use of a simple moving average, but goes on to explain why his charts don't show this, because his charts can't and also explains the downside to the weighted method due its whipsaws, again its stated in the book hence why he has recommended the simple moving average. we should npt be using the weighted moving average if had a choice he wouldn't have done so
this is why we all use the simple moving average

at least it was pretty clear to me. by all means re-read the book