Descending Triangle

What Is a Descending Triangle?

A descending triangle is a chart pattern used in technical analysis to describe price action that forms a triangle shape on a price chart. Its upper boundary slopes downward as each rally peaks lower than the one before, while its lower boundary is roughly horizontal, marking a level where buyers have repeatedly stepped in. The pattern is generally viewed as bearish, since sellers appear to gain control over time.

How the Pattern Forms

The pattern takes shape when a stock's price bounces between two lines. The flat bottom line is a support level where buying has repeatedly halted declines. The sloping top line connects a series of lower highs, showing that each rebound is weaker than the last. As the range narrows, price moves within a tighter area, and trading activity often declines during this period.

A descending triangle is most often associated with a downtrend, where it may be read as a pause before the decline continues. It can also appear at the end of an uptrend, though analysts generally treat that case with more caution.

Interpreting a Breakout

Analysts watch for a breakout, which occurs when price closes decisively below the flat support line. Many practitioners look for rising trading volume alongside the breakout as confirmation. Some use a measured-move method to estimate a downside target, calculated as:

Target = Breakout Level − Height of the Triangle

The height is the distance between the first high and the support line at the widest point of the pattern. This is a rough convention, not a forecast.

Limitations

Like all chart patterns, a descending triangle does not guarantee any outcome. Prices sometimes break below support and quickly recover, a result known as a false breakout. Patterns are also open to subjective interpretation, since different analysts may draw the trend lines differently. For investors, the pattern is best understood as one piece of a broader analysis rather than a standalone signal.