Megaphone Pattern

The megaphone pattern — also called a broadening top or expanding triangle — is a reversal formation defined by expanding volatility: each rally reaches a higher high and each pullback cuts to a lower low, creating a trumpet shape on the chart. Unlike most continuation patterns that compress price action before a breakout, the megaphone signals a market in conflict. Bulls and bears take turns wresting control, and the widening swings reveal that neither side has conviction. The pattern appears most reliably on daily charts after a 20–40% rally over 3–9 months, and it resolves bearishly roughly 53% of the time according to Thomas Bulkowski’s backtesting in the Encyclopedia of Chart Patterns. It is tradeable in two distinct phases: range trading early trendline touches and playing the eventual breakdown.

How to Identify the Megaphone Pattern

1. Prior uptrend of 20–40% — The pattern requires a meaningful rally as its foundation. A megaphone forming after a flat base is not a broadening top; it needs the prior trend to explain the buyer/seller imbalance that creates expanding swings.

2. Minimum 5 alternating pivot points — A textbook megaphone has at least 3 higher highs and 2 lower lows (or 3 lower lows and 2 higher highs). Fewer than 5 pivots leaves the pattern ambiguous. Each high must be higher than the prior high, and each low must be lower than the prior low.

3. Diverging trendlines — Draw a line connecting the swing highs and a second line connecting the swing lows. Both lines must slope away from each other: the upper line rises, the lower line falls. This diverging geometry distinguishes the megaphone from a symmetrical triangle, where both lines converge.

4. Expanding volume on each swing — Volume should increase with each successive move inside the pattern. Rising volume on both up-swings and down-swings confirms that more participants are entering, reflecting the growing disagreement between bulls and bears. Declining volume during swings weakens the pattern’s validity.

5. Duration of 2–5 months on daily charts — Bulkowski’s sample of 200+ patterns shows this range as typical. Patterns resolving in under 6 weeks rarely have enough pivot points to meet the 5-point minimum.

Entry Rules

1. Range trade — early trendline touch (touches 1–2): Enter long within $0.50 of the rising lower trendline, placing a stop 1.5% below the trendline. Sell near the upper trendline, taking profits at 80–90% of the distance to avoid the trendline risk. Use only the first two touches of each trendline — by the third or fourth touch, the pattern may be near resolution and the stop-to-target ratio degrades as the trendlines converge toward a decision point.

2. Range trade — short the upper trendline (touches 1–2): Short within $0.50 of the upper trendline with a stop 1% above the trendline and a target at the lower trendline. Same caveat: late touches carry elevated breakdown risk that erodes the R:R.

3. Breakdown trade — wait for a daily close below the lower trendline on volume at least 1.5× the 20-day average. Intraday breaks below the trendline produce a high rate of false signals. Only a full-day closing price below the level, accompanied by above-average volume, qualifies as a valid breakdown signal.

4. Two-bar confirmation: After the initial breakdown close, require a second day closing below the breakdown level before adding to the position. This two-bar confirmation reduces whipsaws by approximately 30%, though it means entering slightly lower.

Exit Rules & Targets

1. Range trade target: The opposing trendline. Book 80–90% of the theoretical distance to reduce trendline-touch risk.

2. Breakdown primary target: Measured move calculated from the widest part of the pattern. See the calculation below.

3. Trailing stop: Once price moves 50% toward the measured-move target, trail by 3 ATR (Average True Range). This locks in gains while allowing the trend to run.

4. Time-based exit: If price has not reached the measured-move target within 30 trading days of the breakdown, exit at market. Patterns that stall typically indicate a failed breakdown.

5. Throwback management: In approximately 57% of breakdowns, price returns to the broken lower trendline within 11 days. Hold through this retest unless price closes back inside the pattern on closing basis.

Target Calculation: Identify the widest vertical distance within the pattern — measure from the upper trendline to the lower trendline at the rightmost completed swing. Subtract that distance from the breakdown point. Example: pattern width of $39, breakdown at $437, target = $437 − $39 = $398.

Stop Loss Placement

For the breakdown trade, place the initial stop 1% above the high of the breakdown candle — the candle that confirmed the close below the lower trendline. This level sits above the broken trendline, and any close back above it signals that the breakdown has failed. Given the 17% average post-breakdown decline documented by Bulkowski, a stop 1–2% above the breakdown level produces a theoretical R:R of roughly 8:1 at the measured-move target. Actual R:R varies with position entry price; the SPY example below illustrates a realized 4.9:1 ratio on a breakdown trade.

Practical Example

On the daily chart of SPY in late 2021, the ETF formed a textbook megaphone after rallying from $420 to $479 (the prior uptrend). High #1: $479 on November 22. Low #1: $447 on December 3. High #2: $477 on December 27. Low #2: $440 on January 24, 2022. High #3: $457 on February 2.

Range trade setup at Low #2: A trader buying 20 shares near $440 with a stop at $434 (1.5% below) risked $6 per share ($120 total on a $8,800 position). Target: $475 (lower trendline to upper trendline). Potential reward: $35 per share — a 5.8:1 ratio.

Breakdown trade: The January 24 close at $440 broke the lower trendline. Confirmation came on January 27 with a close below $437 on volume approximately 2× the 20-day average. Measured move: widest part of pattern = $479 − $440 = $39. Target: $437 − $39 = $398. A trader shorting 10 shares at $437 with a stop at $445 ($8 risk per share, $80 total) and a target of $398 captured a $39 gain per share ($390 total) when SPY reached $400 by late February 2022 — a 4.9:1 realized R:R.

Best Timeframes for the Megaphone Pattern

The megaphone pattern is most reliable on the daily chart, where Bulkowski’s 200+ pattern sample was collected. Daily charts produce cleaner pivot points and more meaningful volume signals than intraday charts. On 1-hour and 4-hour charts, the pattern appears regularly during earnings seasons and macro volatility events — such as Fed rate decision cycles — but the false-breakdown rate rises due to noise. The 53% bearish resolution rate and 17% average decline figure apply specifically to daily chart data; intraday versions should be treated with more conservative targets. Weekly charts can show megaphones lasting 6–18 months, but the reduced number of data points makes trendline placement less precise.

Common Mistakes

1. Identifying the pattern with only 4 pivot points — Four pivots are insufficient. A 4-point broadening structure has only one confirmed higher high and one confirmed lower low, which could be coincidental. Wait for the fifth pivot before acting.

2. Entering on an intraday trendline break — Price routinely dips below the lower trendline intraday before recovering. Only a daily closing price below the trendline with volume confirmation qualifies as a breakdown. Entering on an intraday break creates a high false-positive rate.

3. Range-trading the 3rd or 4th trendline touch — The first two touches of each trendline offer the best stop-to-target ratios. Later touches compress the distance to the opposite trendline while the stop remains the same size, degrading the R:R. They also carry higher breakdown risk as the pattern matures.

4. Exiting the breakdown trade on the throwback — A throwback to the broken lower trendline within 11 days is documented in 57% of cases and is normal pattern behavior. Traders who exit at the first reversal miss the continuation. The correct response is to hold, using the broken trendline as a new resistance reference.

5. Confusing the megaphone with a symmetrical triangle — Symmetrical triangles show converging trendlines and contracting volatility — a pattern of building consensus. The megaphone shows diverging trendlines and expanding volatility — a pattern of conflict. They imply opposite market psychology and require different trading approaches.

How to Journal Megaphone Pattern Trades

Journal Field	What to Record	Why It Matters
Pattern Type	Megaphone — range trade or breakdown trade	Separate performance stats for the two phases
Trendline Touch Number	Touch 1, 2, 3, or 4	Identify which touch tier produces the best results
Pivot Count at Entry	Number of completed pivots (5, 6, 7+)	Determine whether mature patterns underperform
Volume Ratio at Entry	Entry-day volume vs. 20-day average	Confirm pattern quality and breakdown validity
Throwback Occurred	Yes/No + days after breakdown	Track how often throwbacks happen in your setups
Pattern Duration	Weeks from first pivot to entry	Test whether longer patterns have different outcomes
R:R Realized	Actual gain or loss vs. initial stop	Compare realized R:R against the 5:1+ theoretical

Tracking these fields across 50 or more megaphone trades reveals which phase — range or breakdown — fits a trader’s execution style and risk tolerance. JournalPlus’s tag filters let traders isolate every megaphone trade by touch number or phase in one click, and the pattern performance dashboard shows realized R:R against targets at a glance. Over time, traders can identify whether they consistently exit range trades too early or whether breakdown entries are too aggressive, then adjust accordingly.

For further context on the broader volatility patterns that share characteristics with the megaphone, see the broadening formation guide and the contrasting symmetrical triangle. Traders who use the megaphone for swing trades may also find the rising wedge relevant for similar reversal setups. If you apply the breakdown trade as part of a systematic approach, the swing traders use case covers how to build a journaling workflow around multi-day pattern trades.