or maybe someone just needed to cash out some btc
or..
someone had $6.17 flagged, and when the drop was at 6.17 it triggered a long/leverage/whatever is called, buy up of btc.

Now the mystery buyer is dumping his loot, and the price drops.
I speculate that its not the expliciit 21/10ers though, because they are still patiently waiting for the next crossover.
(all speculation).
[EDIT] Goomboo, this system is uber-intriguing. I've posting all this stuff here in your thread, because you are the teacher of teh system, but if its too much, let me know.. I can shift on out and make a new space. Although.. I think I'm done for now in any case.
No worries, I'm glad to see that someone is exciting about trend following. I wish you profitable trading, feel free to post here any time.