There's nothing on that chart. Here's a response from another board from another guy I respect. Someone copied your post and asked him about it:
A 7 day moving average will not "pinpoint" any major trend change until well after the fact, since it will turn up or down almost on a dime, and will be subject to many whipsaws. You won't know when it has turned for real until it has made a major move in the opposite direction, by which time the move will be well under way and obvious to everyone. This is a great example of a backtested strategy that has no practical application in real time. Using March 21st of this year as an example of where it pinpointed a "top"? C'mon. A wiggle top at best. That top lasted barely a week and look where we are since.
And, oh BTW: the 7 DMA of actual index prices is even more miraculous in "pinpointing" tops and bottoms: