How do I add the Hull ma to this Book?

I found this very good stock buy and sell book from Gummy stuff. He adds that you can add your own calculation to the Book after column L5. Ok how I do this.

http://www.financialwisdomforum.org/...lculations.htm

This is such a complicated Worksheet I am lost where to start . I would like to add the Hull moving average to column AB 5.



Any ideas please. And the gummy stuff has all types of stock stuffed in it.
Thanks
i2trader