Technical Definition
The Expanding Triangle is a chart pattern characterized by higher highs and lower lows, where price swings widen over time and the trendlines diverge instead of converging. This pattern reflects increasing volatility and uncertainty, with neither buyers nor sellers able to establish sustained control. Direction is confirmed only after a decisive breakout or breakdown.
It is like a balloon expanding before it pops. Price swings get wilder until something breaks.
Volatility is expanding, not contracting
Market Psychology
Uncertainty
Participants begin to disagree on fair value. Price swings widen gradually.
Emotion
Fear and greed dominate decision-making. Overreactions become frequent.
Chaos
Neither side can maintain dominance. Stop losses are triggered on both sides.
Resolution
Eventually, one side exhausts the other, leading to a strong directional breakout.
Pattern Anatomy
Rising Highs
Each upward swing pushes higher. Aggressive buying.
Falling Lows
Each downward swing drops lower. Aggressive selling.
Diverging Trendlines
Lines move apart, creating a widening triangle.
Breakout Zone
A decisive move outside the pattern resolves the uncertainty.
Pattern Rules
Divergence
Trendlines must clearly diverge.
Higher Highs
Each rally should exceed the previous high.
Lower Lows
Each decline should break the previous low.
Volatility
Volatility should expand with each swing.
Resolution
Direction is confirmed only after breakout or breakdown.
Tactical Execution
Wait for breakout
Stop loss inside the pattern
Target nearby support/resistance
Signal Confirmation
- Strong directional candle outside the structure
- Expansion in volume during resolution
- Failure of price to re-enter the pattern
- Sustained movement in the breakout direction