Agree, a bull pennant in an uptrend, logically, has a greater chance of an upside move but you still have to consider the fact that a bull pennant could trade into an ascending triangle and trigger your stop in the process, or make a sharp break below support, for whatever reason, and head northward shortly thereafter. The stock market is nothing more than a random number generator and random number generators do, in fact, create patterns.
Somone a while back on this board (can't recall who it was) said the key to trading patterns is doing it on the right stocks - i.e. GOOG, AAPL, RIMM, and the like. Well, if this is the case, then you aren't trading patterns, you are trading fundamentals. Stocks with poor fundamentals don't behave well when they form patterns because they don't have the fundamentals to support their movement unless the move is a result of speculation, rumor, or pumps from the likes of Cramer.
Don't get me wrong, I think fundamental analysis is heavily flawed as well. Why anyone would buy a stock soley because it has formed a bull pennant or because it has advanced 200% on good fundamental news is beyond me. Could it go higher, could you make a profit? Sure, crazy shit happens in this business but in the long run you're destined for failure by buying high and expecting to sell higher, just because you see a pattern.
Ask the sharpest minds in the investing business and they will tell you they buy great companies with superior economics when everyone else is selling them -- here's the key, when everyone else is selling them. Tell them about your bull pennants and they'll probably get a good chuckle.
Quote from whitster:
"So there is dilemma one -- which way will it break? The odds are 50/50."
and this is supported by what evidence?
really, the lack of understanding of math, game theory, etc. by supposed "traders" astounds me.
just because a situation has two outcomes does not mean the odds are 50/50
that's about as basic an element of statistics as there is.
fwiw, i don't trade "patterns" either, in that i don't make any decisions SOLELY based on a shape. do i take patterns into account, as a small part of the greater whole? yes/