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neutral Signal
Broadening Formation
Also known as a "megaphone" pattern, the broadening formation is characterized by higher highs and lower lows with two diverging trendlines. This expanding range signals increasing market volatility, indecision, and uncertainty — conditions that often precede a significant reversal.
How to Trade
Wait for a confirmed breakout above the upper trendline (bullish) or below the lower trendline (bearish) with a strong candle close and elevated volume. This is a challenging pattern to trade due to the high volatility inside it — strict stop losses are essential.
Market Psychology
Market participants are becoming increasingly emotional and uncertain, driving price in ever-wider swings. Buyers and sellers alternate in control without either establishing dominance. This expanding volatility often occurs during periods of high news flow, geopolitical uncertainty, or at major market turning points. The eventual breakout direction usually opposes the expectation.
Technical Diagram
This visual represents the ideal candle formation and breakout points for the Broadening Formation pattern.
Key Characteristics
An upward-sloping upper trendline connecting progressively higher highs
A downward-sloping lower trendline connecting progressively lower lows
The two trendlines diverge, creating a widening "megaphone" or "expanding triangle" shape
At least 5 alternating contact points (3 on one trendline, 2 on the other) for a well-formed pattern
Volume is typically irregular and elevated throughout the pattern, reflecting high uncertainty
Trading the Broadening Formation
Entry Signals
The safest entry is on a confirmed breakout above the upper trendline or below the lower trendline after at least 5 swing points have formed. Aggressive traders may attempt to trade bounces within the pattern (buying the lower trendline touch, selling the upper), but this requires extremely tight stop losses due to the pattern's volatility. Always wait for a clear candle close outside the boundary.
Risk Management
This is one of the highest-risk patterns to trade due to the expanding volatility within it. Use smaller position sizes (0.5–1% of capital rather than the standard 1–2%). For breakout trades, place the stop on the other side of the most recent swing point. The pattern's irregular swings make standard stop placement challenging.
Profit Targets
The standard measured move is the height of the pattern at its widest point projected in the direction of the breakout. However, because of the high failure rate and volatility of this pattern, consider taking profits earlier — at the 50–75% of the target — and use trailing stops rather than holding for the full measured move.
Timeframes
Most significant on daily and weekly charts where it signals major market uncertainty or distribution. On shorter timeframes, broadening formations appear during highly volatile periods (around earnings, economic data releases, etc.). The pattern is most common at major market tops rather than bottoms.
Volume Context
Volume in a broadening formation is characteristically irregular and elevated — reflecting the emotional and uncertain nature of the market during this phase. Unlike other patterns where volume should decline during consolidation, volume in a broadening formation tends to remain high throughout. A volume surge accompanying the eventual breakout adds confidence to the trade.
Historical Success Rate
Broadening formations are among the most challenging patterns to trade reliably, with success rates in the range of 55–65% depending on the breakout direction and market context. They are most reliably bearish when they form at major market highs (tops) after extended uptrends. The difficulty is that the wide swings inside the pattern create many false signals.
Common Mistakes to Avoid
Trading inside the pattern without clear trendline touches — the volatility within makes internal trades extremely risky
Using normal position sizing — the high volatility and wider stops require meaningfully smaller position sizes
Holding through the entire measured target — the irregular nature of this pattern makes it appropriate to take profits earlier than with cleaner patterns
Assuming the breakout will follow the prior trend — broadening formations at tops often break downward, against the prior uptrend
Requiring exactly 5 swing points — while 5 is the minimum, patterns with 7 or 9 swings are actually more reliable
Broadening Formation — Frequently Asked Questions
What is a broadening formation (megaphone pattern)?
A broadening formation is a chart pattern where price makes progressively higher highs and lower lows, creating two diverging trendlines that form a megaphone shape. It signals increasing volatility and market uncertainty. The breakout direction determines whether it is bullish (upside break) or bearish (downside break).
Is a broadening formation bullish or bearish?
The pattern is neutral but has a slight bearish bias when forming at major market tops. The prior trend and breakout direction determine the trade direction. Broadening formations at highs after extended uptrends are commonly associated with distribution and eventual bearish reversals.
How many swing points are needed for a valid broadening formation?
A minimum of 5 alternating swing points (highs and lows) is required — typically 3 touches on one trendline and 2 on the other. Patterns with more swing points (7+) are actually more reliable and easier to trade than those with exactly 5 swings.
Why is the broadening formation hard to trade?
The expanding volatility creates numerous false breakout signals within the pattern. The wide price swings make stop placement difficult, and the irregular volume makes confirmation harder. It requires smaller position sizes, wider stops, and earlier profit-taking relative to most other chart patterns.
