Pennant pattern

A pennant pattern is a bullish or bearish continuation pattern consisting of two parts: the pole (a sharp, nearly vertical price move) and the pennant (a small, converging triangle consolidation). The pennant resembles a flag’s slightly smaller cousin; whereas a flag is rectangular, a pennant is triangular with converging boundaries. After the pole’s strong move, price consolidates in the pennant’s progressively narrowing range. Once the pennant apex is reached (where the converging lines meet), price breaks out in the original pole direction, continuing the trend. Pennants are one of the most reliable continuation patterns, especially when formed on high volume.

How pennant pattern forms

The pennant begins with a sharp, substantial pole—a strong directional move on significant volume. A stock might rocket 30% higher in 5 days (bullish pole) or plummet 30% in 5 days (bearish pole).

After this powerful move, consolidation begins. Price enters a tight, converging range (the pennant)—much smaller than the pole. The pennant’s upper boundary and lower boundary are converging toward an apex (a meeting point). Volume shrinks dramatically as the pennant develops, showing that traders are catching their breath after the pole’s violent move.

As the pennant apex approaches (the converging lines nearly meet), price breaks decisively out of the pennant in the original pole direction, often with a surge in volume. The pennant is complete, and the trend resumes.

The pole’s importance

The pole must be a real, substantial move—at least 10-15% on heavy volume. A wimpy pole (a 2% move) followed by a triangle is not a pennant pattern; it is a triangle. The pole’s magnitude shows the move has genuine conviction. The pennant is simply the market catching its breath before the next leg.

The pennant’s geometry

The pennant is a small, converging triangle. Unlike a symmetrical-triangle (which may be neutral regarding direction), a pennant is always a continuation pattern—it forms after a decisive pole and breaks out in that direction.

The pennant is much smaller than the pole (typically 4-8% of pole height) and forms more quickly (5-15 days) than larger triangles.

Volume behavior

Volume on the pole is explosive—high volume on a fast move signals real conviction. During the pennant formation, volume plummets, showing consolidation and profit-taking. On the breakout from the pennant, volume should surge again, confirming the breakout is genuine. Declining volume through the entire pattern is a warning sign.

Measuring the target

The measuring objective is the height of the pole projected from the pennant breakout point. For example, a pole from $50 to $100 (height of $50) would, upon breakout from the pennant, target approximately $150 (the breakout level + $50). This is not guaranteed but reflects typical behavior.

Bullish pennant versus bearish pennant

• Bullish pennant: Sharp uptrend pole, consolidating triangle, breakout above the pennant apex.
• Bearish pennant: Sharp downtrend pole, consolidating triangle, breakout below the pennant apex.

The patterns are identical in structure and reliability; direction differs based on the pole.

Time to apex

As the pennant apex approaches, the market is building tension. The breakout is imminent. A trader watching the pattern can anticipate when the breakout will occur (approximately when the converging lines meet). This timing precision is useful for preparing entries.

False breaks

False breaks from pennants are rare. When a pennant forms on a powerful pole and the volume is high, the breakout is typically in the pole direction and is sustainable. However, brief touches beyond the apex followed by a reversal are possible on low-volume noise.

Trading pennants

Wait for apex approach: Enter as the pennant apex nears, anticipating the imminent breakout.

Confirm with volume: Enter only when price closes decisively outside the pennant on above-average volume.

Entry: Buy on bullish pennant breakout above the apex; short on bearish pennant breakout below.

Stop-loss: Place on the opposite side of the pennant apex.

Profit target: Use the pole height as the measuring objective.

Pennant versus flag

Both are continuation patterns after sharp poles:

• Flag: Rectangular consolidation, sloped against the pole direction.
• Pennant: Triangular consolidation, converging lines.

Pennants often resolve more decisively because the converging lines create a natural breakout point (the apex). Flags may extend longer without a clear breakout point.

Pennant duration and reliability

Shorter pennants (5-10 days) are typically more reliable than longer ones. A pennant that extends 3+ weeks may not be a pennant but a larger triangle. The more defined the apex, the more reliable the pattern.

Pennants in strong trends

A pennant within a powerful, multi-day uptrend or downtrend is a high-probability continuation signal. The stronger the pole, the more certain the continuation.

Real-world example

A stock rallies from $50 to $100 in 5 days on heavy volume (bullish pole, $50 gain). It then consolidates in a converging triangle between $98 and $90 for 8 days (pennant). It breaks above $100 on a volume surge. The measuring objective is $100 + $50 = $150.

Academic perspective

Pennant patterns have solid support in academic research for continuation behavior, particularly when high volume is present on the pole and breakout.

See also