Droskill was correct in the post.
The AFL for the 4% model is on the AmiBroker AFL site at http://www.amibroke r.com/members/ library/formula. php?id=1247
I own MTR Investors Group. The 4% model is updated there automatically at the close of each day. There are some changes to it so that it performed better. Those changes were coded and back-tested in AmiBroker for over a year. There are still some work to do, but without AmiBroker that model on MTRIG.com would never have come to pass.