Pennant vs Flag vs Triangle: How to Tell the Three Patterns Apart

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Last updated: 16 October 2026 · By Spencer Li, CFTe

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A pennant and a flag are both short pauses that follow a sharp price move, called the flagpole. The difference is the shape of the pause. A flag has 2 parallel lines that drift slightly against the move. A pennant has 2 lines that squeeze together into a tiny triangle.

A triangle looks like a big pennant, and that is where most of the confusion starts. The difference is that a triangle does not need a flagpole in front of it, and it takes much longer to form. Our post on the triangle pattern treats it as a medium-term pattern, often around 50 to 100 bars.

So the quick test is this. Look for a pole, check whether the lines run parallel or converge, and compare how long the pause has lasted. Those 3 questions sort almost every case, and the answer changes how you measure the price target.

Why do these 3 patterns get mixed up?

Imagine you pull up 3 charts on a Sunday evening. Each one shows a stock that moved up, then went quiet inside some lines. On the first chart the lines run parallel. On the second they squeeze to a point after a few days. On the third they also squeeze to a point, but it has taken months, and there was no sharp move before it.

They look like cousins. They are. All 3 are consolidations, a stretch where buyers and sellers pause and the price stops trending. All 3 usually resolve with a breakout and a burst of volume. And all 3 are often called continuation patterns, because the breakout tends to go the way the trend was already going.

But the details matter, because they tell you different things about what the market has just done, and they give you different targets. Mixing them up is how traders end up confused about why a “pennant” ran out of steam far short of the target they expected.

What is the 3-question test?

Here is the test I use, in the order I ask it:

1. Was there a pole? Flags and pennants only exist after a fast, steep move on heavy volume. If the pause came after a slow, grinding trend, it is not a flag or a pennant, whatever the lines look like.
2. Do the lines run parallel or converge? Parallel lines that slope slightly against the move make a flag. Lines that squeeze together make a pennant, or a triangle if the answer to question 3 says so.
3. How long is the pause compared with the pole? Flags and pennants are brief. A pattern that keeps going for many weeks, or that is wide compared with the move before it, is behaving like a triangle.

[INFOGRAPHIC: the 3-question test as a flow chart, pole yes/no, lines parallel/converging, pause short/long, ending at flag, pennant or triangle, with a small sketch of each]

Pennant vs flag vs triangle: what are the differences?

The last row is the one that costs money when it is wrong, since a trader who measures a triangle as if it were a pennant can end up holding for a move the chart never promised. Flags and pennants borrow their target from the pole, because the idea is that the second leg roughly echoes the first. A triangle has no pole, so its target comes from its own height at the widest part.

If you want a simple daily routine for checking setups like these, the free 15-Minute Swing Trader’s Checklist is at the end of this post.

What is the difference between a pennant and a symmetrical triangle?

This is the closest call of the 3, because the shapes are nearly identical. Both have lower highs and higher lows squeezing towards a point.

The pennant is the small, fast version that hangs off a pole. It is the market resting for a short while after a burst. The symmetrical triangle is the slow version that can form anywhere in a trend. It reflects a longer stand-off where neither buyers nor sellers are in a hurry.

Suppose a stock jumps from 20 to 26 in a week, then squeezes into converging lines for a few days, and breaks out at 25. That is a pennant, and the rough target is the pole’s 6 points added to 25, which gives 31.

Now suppose the same stock drifts between 20 and 26 for 4 months, with the swings getting narrower, and breaks out at 24. That is a triangle. Its rough target is its height at the widest part, 6 points again, added to 24, which gives 30. The numbers are similar here by design, but on a real chart the pole and the pattern’s height are often very different sizes, which is why naming the shape correctly matters.

A pennant can also turn into a triangle. If the “brief pause” keeps going well past what the pole would justify, the urgency behind the pole has faded, and the pattern should be read as a triangle from then on.

Does the difference change how you trade them?

Less than you might expect, which is a relief, because it means the hard work is in reading the chart correctly and the trade itself follows a logic you already know. The logic of the trade is the same for all 3: wait for the breakout, confirm it, and know where the idea is wrong.

In my own setups, flags and pennants sit in the same bucket. I wait for a candle to close outside the pattern with volume behind it, and most of the time I wait for a retest of the breakout before acting. What changes between the 3 is mainly the target, and how much patience the pattern deserves. The step-by-step with entries and stops lives in our bull flag and bear flag trading strategy guide, and the definition of the flag on its own is in what is a flag pattern in trading.

There is a fourth look-alike worth knowing. A wedge also has converging lines, but both lines slope the same way, up or down. That changes its meaning a lot, so it has its own post: rising and falling wedge patterns.

Are pennants reliable?

Not everyone thinks so, and the sceptics deserve a hearing. William O’Neil, in How to Make Money in Stocks, wrote that his firm’s research found triangles, coils and pennants “unreliable and risky”. The classic chart books disagree, and treat pennants as a normal continuation pattern after a sharp move.

Personally, I think both camps are partly right. A pennant on its own is a weak signal, because small, quick patterns are easy to see in noise. The pennant becomes useful when the other evidence agrees: a clear pole on heavy volume, a quiet pause, and a breakout that closes outside the lines in the direction of the existing trend. Strip those away and you are trading a doodle. That gets expensive.

The broader family of patterns, and how they fit together, is covered in the price chart patterns guide and the post on continuation and reversal patterns.

Back to those 3 charts from Sunday evening. The parallel pause after the burst is a flag. The quick squeeze after the burst is a pennant. The slow squeeze with no burst is a triangle. Ask the 3 questions in order and the label usually falls out on its own, along with the right way to measure the target.

FAQ

What is the difference between a pennant and a flag?

Both follow a sharp move. A flag has parallel lines that slope gently against the move. A pennant has converging lines that form a small triangle.

Is a pennant the same as a triangle?

No. A pennant is small, short and hangs off a sharp move. A symmetrical triangle is larger, takes longer to form, and needs no sharp move before it.

Is a pennant bullish or bearish?

Either. A bullish pennant follows a sharp rise and a bearish pennant follows a sharp fall. The pattern counts once the price breaks out in the direction of that move.

How do you measure a pennant price target?

Take the height of the flagpole and project it from the breakout point. A triangle is measured differently, using the height of the pattern itself.

Which is more reliable, a flag or a pennant?

Neither should be traded on shape alone. Both depend on a clear pole, a quiet pause and a confirmed breakout, and some well-known traders, such as William O’Neil, have doubted pennants altogether.

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About the author. Spencer Li is the founder of Synapse Trading and a Certified Financial Technician (CFTe). His trade log is public: every trade since April 2024, dated, losses left in.

Educational content only, not personalised financial advice. Trading carries risk, including loss of capital. Past performance is not indicative of future results. Synapse Trading is not licensed or regulated by MAS.

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Educational content only, not personalised financial advice. Trading carries risk, including loss of capital. Past performance is not indicative of future results. Synapse Trading is not licensed or regulated by MAS.