These are great references, Sendme, and I would point out that most of these blow-offs are preceded with a sustained uptrends which have buried all of those trying to time the exact top!
So, they all do have similar topping patterns, but are best looked at in retrospect.
Anyway, so far, it looks to me like the other board has made fun of fibonacci retracements and projections in price....but clearly the 38.2% bullish retracement level of 21.25 has up to now proven to have been a pretty good "spot".
In an earlier post you mentioned that standing back and watching might be a good thing; I agree.
This might increase the odds again a a push higher and past the last high...so I guess it's time to watch and see if we can get up to that area that is possible (27-28)...who knows?
