While I've never seen this written in any technical book I have found many stock patterns evolve into something else. So in the end there are patterns within patterns withing more patterns. So while they do tend to play out in a typical manner I have seen numerous times that Triangles especially Symmetrical Triangles can be simply incomplete rectangles in the end. Therefore rather than reacting on a break of the converging lines and expecting a huge projected price move, one shouldn't 'expect' price to clear the high and low points of the pattern. These would be your top AND bottom blue lines that form a "Rectangle". As that just might be all it really ends up to be is a Rectangle. So one can buy or sell a break of the converging lines especially on an increase in volume but exit at the furthest price point of the pattern. Then on a 2nd break of that price point on increased volume buy again and use that price as a stop. That 2nd buy point would be a breakout of the "Rectangle" which is also bullish and also a continuation pattern just like the Symmetrical Triangle. Hopefully that makes sense to someone.