Hello Rien,
Nice to see you made it from TMF... I've been playing around with the ZIGZAG metric (you can find it for free on Stockcharts.com to get some idea of how often a given equity moved by a given percentage, up or down.
I set the Zigzag for 35 percent, to get a sense of how often my AIM accounts might be expected in the future to move through the Hold Zone and complete a buy-sell-buy or sell-buy-sell cycle -- which as you know is the Holy Grail of AIM.
You could use zigzag to help you with your project to fine tune the SAFE settings. However, I am not necessarily endorsing this approach, as I tend more toward the conservative, BTB approach.
Good luck,
J