What is a Descending Triangle? A descending triangle refers to a bearish chart pattern used in technical analysis that is characterized by a descending upper trendline and a second, flatter horizontal trendline, which is lower than the first. Chart Patterns: The Basics Behind Descending Triangles Descending triangles, along with terms such as ascending triangles, head-and-shoulders, flag, pennant, and cup-and-handle are all examples of chart patterns, of which there are over 50 types according t