What is the difference between a triangle and a wedge?

The difference between a triangle and a wedge is the slope of the trendlines: triangles have one flat or oppositely-sloped trendline, while wedges have both lines sloping in the same direction.

Triangles signal consolidation before a breakout that can go either way (ascending, descending, or symmetrical), and volume often rises into the apex.

Wedges signal a reversal, with volume declining as the pattern matures and weakening momentum giving way to a sharp move against the slope.

Triangle breakouts more often continue the prior trend; wedge breakouts flip it.