Broadening Formation
Two diverging boundaries — higher highs and lower lows in the same stretch — so the range widens rather than narrows.
The opposite of a triangle, and the shape with the weakest claim to being a signal at all. Widening range means the market is finding less agreement, not more, and a pattern whose defining feature is uncertainty is poorly suited to producing a target. It is detected and shown because readers ask about it and because a measured record is a better answer than silence; it is also flagged as low reliability on every card, which is a statement about the pattern family rather than about how cleanly this particular one is drawn.