Why harmonic price pattern 'ABCD' has fib extention sell or buy point of 1.272?

please advise anyone reading this, on the school, why does the hamonic price pattern ABCD state that the sell point is or buy point is of the 1.272 fib extention level of BC, should I enter this new level in to my charting platform because as far as i am aware it is not a fib level???:15:
please please help i am confused i would ike to be enlightened :slight_smile:

This entire book is about harmonics and fib ratios.
You should find your answer there :slight_smile:
enjoy
http://www.forexfactory.com/attachment.php?attachmentid=1474748&d=1406123056

thank you moretti your a legand
:slight_smile: