Hmmm...obviously I'm not getting the message through here. The only bit written by me is at the top "I'm pretty sure this was the system that was originally posted...." The rest is copied and pasted from the link as I said before. It's a copy of what SOMEONE ELSE wrote. I didn't write the system so I cant answer questions about it.
No problem. I dont think there was any explanation for those particular numbers but I suspect it was just curve-fitting. I seem to remember there was also a rule they you didnt trade it on Thursdays