# Broadening Formation

> A broadening formation has higher highs and lower lows, widening like a megaphone. Learn what it says about volatility, how to trade it and its risks.

Source: https://learn.tradelabsai.com/chart-patterns/broadening-formation/  
Track: Chart Patterns · Level: Intermediate · Updated: 2026-10-03  
Publisher: TradeLabs AI (https://tradelabsai.com). Education, not financial advice.  
Cite as: TradeLabs Learn, "Broadening Formation", https://learn.tradelabsai.com/chart-patterns/broadening-formation/

A broadening formation, also called a megaphone pattern, is the opposite of a triangle. Instead of converging, price swings get wider over time: each high is higher than the last and each low is lower than the last. Drawn with two diverging trend lines, the shape looks like a megaphone. It shows rising volatility and a market where buyers and sellers are both aggressive but neither can take control.

## Anatomy

*Figure: Swings expand as both buyers and sellers push further each time.*

| Feature | Description |
|---|---|
| Highs | Each swing high above the previous one |
| Lows | Each swing low below the previous one |
| Trend lines | Diverging: upper line rising, lower line falling |
| Volatility | Increasing as the pattern develops |
| Typical touches | At least three on one line and two on the other |

## What it means

A broadening formation reflects a market that is unstable and emotional. Each rally attracts buyers who push beyond the last high, and each drop attracts sellers who push beyond the last low. Many breakouts fail in both directions. This type of behaviour is common near major tops, around big news cycles and during periods of uncertainty. Many technical analysts consider broadening tops a warning sign, because they often appear late in uptrends.

## Trading a broadening formation

The pattern is hard to trade because breakouts beyond the lines often reverse. Common approaches:

### Trading the swings

Buy near the lower line and sell near the upper line, like a range, but expect each swing to overshoot the last. Stops must be wide, and position sizes small.

### Fading false breaks

Because price repeatedly breaks the previous high or low and then reverses, some traders wait for a new extreme beyond the prior swing that quickly fails, then trade back towards the other side. See [Failed Breakouts and False Breaks](https://learn.tradelabsai.com/price-action/failed-breakouts/).

### Trading the eventual breakout

At some point, price breaks one of the diverging trend lines and keeps going. Confirmation, such as a close beyond the line plus a retest, is especially important here because false breaks are so common.

**Example: Swings that keep widening**
An index trades in a megaphone over three months: highs at 4,920, 4,980 and 5,050, lows at 4,780, 4,710 and 4,640. Each move overshoots the last. A trader who bought each low with a stop just below the previous low would have been stopped out repeatedly. A trader who waited for a new low at 4,640 to be rejected and recover above 4,710 found a better entry, with a stop below 4,630 and a target near the upper line.

## Risk management in widening markets

- **Reduce position size,** because stops need to be wider in expanding volatility. See [Volatility and ATR-Based Sizing](https://learn.tradelabsai.com/risk/volatility-and-atr-based-sizing/).
- **Take profits sooner,** since swings reverse sharply.
- **Avoid adding to losing trades** on the assumption that the pattern will reverse at the line; the next swing may extend further.

## Broadening formation vs symmetrical triangle

| | Broadening formation | Symmetrical triangle |
|---|---|---|
| Lines | Diverge | Converge |
| Volatility | Rising | Falling |
| Swings | Getting larger | Getting smaller |
| Typical meaning | Instability, uncertainty | Compression before a breakout |

See [Symmetrical Triangle](https://learn.tradelabsai.com/chart-patterns/symmetrical-triangle/).

## Common mistakes

- **Trading it like a tight range** with small stops.
- **Treating every new high as a breakout.**
- **Forcing the pattern** onto ordinary volatile markets without clear diverging swings.

## Frequently asked questions

### What is a broadening formation?

A pattern of higher highs and lower lows that widens over time, like a megaphone, showing rising volatility.

### Is a broadening formation bullish or bearish?

Neither by definition, though broadening tops after long uptrends are often viewed as bearish warning signs. The breakout direction matters most.

### Why is the megaphone pattern hard to trade?

Because swings keep extending beyond prior highs and lows, false breakouts are common and stops must be wide.

Next, learn the bullish compression pattern: the [Ascending Triangle](https://learn.tradelabsai.com/chart-patterns/ascending-triangle/).

## Continue learning

- Next lesson: [Ascending Triangle](https://learn.tradelabsai.com/chart-patterns/ascending-triangle/)
- Previous lesson: [Rounding Bottom](https://learn.tradelabsai.com/chart-patterns/rounding-bottom/)
- Related: [Rounding Bottom](https://learn.tradelabsai.com/chart-patterns/rounding-bottom/): A rounding bottom is a slow, U shaped reversal from a downtrend to an uptrend. Learn how it forms, why volume matters, how to confirm it and how to trade it.
- Related: [Symmetrical Triangle](https://learn.tradelabsai.com/chart-patterns/symmetrical-triangle/): A symmetrical triangle has lower highs and higher lows converging to an apex. Learn why it signals compression, how to trade the breakout and avoid false moves.
- Related: [Range Structure and Consolidation](https://learn.tradelabsai.com/price-action/consolidation/): Consolidation is when price moves sideways between support and resistance. Learn to identify ranges, trade them, spot breakouts and avoid range traps.
- Related: [Volatility](https://learn.tradelabsai.com/markets/volatility/): Volatility measures how much and how fast prices move. Learn historical and implied volatility, ATR, the VIX, why volatility clusters and how it affects risk.
- Related: [Failed Breakouts and False Breaks](https://learn.tradelabsai.com/price-action/failed-breakouts/): A failed breakout is when price breaks a level then quickly returns. Learn why fakeouts happen, how to confirm them and how to trade the trapped traders' reversal.
- Related: [Compression and Expansion](https://learn.tradelabsai.com/price-action/compression-and-expansion/): Markets alternate between quiet compression and explosive expansion. Learn how to spot compression with ranges, ATR and Bollinger Bands, and trade the breakout.