Triangles/Wedges These types of patterns develop as a result of contracting volatility which portend price expansion upon breakout. There are three types – symmetrical, ascending, and descending. Symmetrical triangles are the most neutral of the three variations as higher lows and lower highs converge towards the apex of the formation. If they develop early in a trend they tend to act more as an indication of pending continuation of the trend prior to development, however; ...