Triangle Pattern Trading: How to Trade the 3 Types of Triangle and Catch the Breakouts That Hold

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By Spencer Li, CFTe · Last updated: 10 August 2026

A triangle pattern is a chart pattern where price gets squeezed between two trendlines that slope towards each other, until it breaks out, usually in the direction of the trend that came before it. There are three types. The ascending triangle has a flat top and rising lows and leans bullish, the descending triangle has a flat bottom and falling highs and leans bearish, and the symmetrical triangle has both lines sloping inwards. You can trade the first two by entering on the breakout or by waiting for a retest of the broken line, and the breakouts that hold tend to come about two-thirds of the way to the tip.

I first wrote this guide in January 2021. When I went back through 29 of my weekly market outlook videos from October 2025 to June 2026 to update it, the words “ascending triangle” came up in 18 of them. The descending triangle came up in none, which probably says more about the past year’s market than about the pattern.

What is a triangle pattern?

One of the best descriptions I know comes from a book first published in 1948. In Technical Analysis of Stock Trends, Robert Edwards and John Magee call the symmetrical triangle a “coil”, and it is a good name, because price gets wound tighter and tighter until it snaps free.

Each swing inside a triangle is a little smaller than the one before, so the two lines you draw across the highs and lows meet at a point on the right. That point is the apex. In my experience it is a medium-term pattern of about 50 to 100 bars, and it tends to show up in the middle or late stages of a trend.

Edwards and Magee also wanted to see four turns before calling anything a triangle: a top, a bottom, a lower top and then a higher bottom. With fewer than that, you are mostly joining dots.

What is happening inside the triangle?

Think of a loaded spring. Bulls want higher highs and higher lows, bears want lower highs and lower lows, and inside a triangle neither side gets its way. So the swings shrink and volume dries up, as both sides step back and wait for the other to blink.

When price finally breaks one of the lines, the traders who were sitting on their hands jump in at once. That is why a real breakout tends to come with a jump in both price and volume.

An old Wall Street saying explains the volume rule. It takes buying to push a stock up, while a stock can fall under its own weight. So an upside break needs volume to be trusted, and a downside break often starts quietly.

What are the three types of triangle?

So which way will it break? The slope of the lines usually tells you before price has done anything. A flat line is a level that price keeps attacking, and the sloping line shows which side is gaining ground.

In an ascending triangle, buyers keep stepping in a little higher each time while sellers keep selling at the same price, and sooner or later the sellers run out of shares. Edwards and Magee put the buyers’ odds at around 9 to 1 once the rising line is clear. That came from their experience rather than a count, and 1948 had no algorithms, so I treat it as a strong lean.

The descending triangle is the mirror image, with lower highs pressing down on a flat floor, and when the floor breaks, holders who watched it hold for weeks lose their nerve and sell too. Fear does a lot of the work in a descending triangle.

Why did I stop skipping the symmetrical triangle?

In the 2021 version of this guide, I said I mostly leave the symmetrical triangle alone. I still think it is the weakest of the three. Edwards and Magee called it the “worst offender” for false moves in their whole book, which is quite a title to hold.

The trouble is confirmation. When price breaks out of the top of a symmetrical triangle, an earlier swing high is still sitting above it. Price has to clear that too before you know it is trending rather than sloshing around a wider range. By then, the clean entry has usually gone.

But I have softened on it, and my own outlooks show it. On 27 November 2025, I said that gold “looks like it has just broken out of this symmetrical triangle pattern,” and that I had added some positions. Three weeks later, I described gold as a consolidation forming inside an uptrend, and silver beside it had already formed a clean ascending triangle near its all-time highs. The trend did the confirming for it.

Edwards and Magee suggested much the same. A symmetrical triangle gives few clues on its own chart, so you look at the other charts, and if most look bullish, yours will probably break upwards too. I noticed this on 29 January 2026, when quite a few sector ETFs were forming ascending triangles at once, and so were the S&P 500 and the QQQ. One triangle is a guess. The same triangle across a whole list of sectors is the market telling you something.

If you would rather check charts for a few minutes after work than all evening, my free 15-minute swing trader checklist is the daily routine I use myself.

When does a triangle usually break out?

Here is an odd thing about triangles. You would expect a longer squeeze to build more pressure, but the longer price waits inside the pattern, the weaker the breakout tends to be.

The breakouts that hold usually come when price is about two-thirds to three-quarters of the way to the tip. Edwards and Magee gave a range of half to three-quarters, and picked out two-thirds as the most reliable spot. Past the three-quarter mark, price often just drifts into the apex and fizzles out. Their advice for that case is the most useful line in the chapter: “go away and look for something more promising elsewhere in your chart book.”

Personally, I measure it by eye, by extending both lines to where they meet, and if price is already deep into the last quarter, I move on to the next chart.

How do you trade a triangle breakout?

There are two main ways to trade the ascending and descending triangles, and the difference is how early you get in.

With the breakout entry, you buy as price closes above the flat top of an ascending triangle. My own scan asks for a close, since a wick that pokes through and falls back does not count, and for a clear jump in volume. It works best when the trend before the triangle was strong and the triangle is small.

With the retest entry, you let the break happen and wait. Say an uptrend is followed by a bearish descending triangle. That is a small contradiction, so the break might be messy. You wait for price to come back up to the old flat support, now resistance, and enter once the pullback ends and price turns down again, with the stop just beyond the end of that pullback. Edwards and Magee noticed that when the rest of the market is firm, this kind of pullback is fairly certain.

In practice, the retest is the entry I take most often, because the stop is tighter. The cost is that the strongest breakouts sometimes leave without you.

I do not always follow my own order either. On 17 December 2025, I said in my outlook that Tesla looked like a giant ascending triangle, and that this was why I had entered before the breakout even happened. That is a more aggressive third way, and I only use it when the bigger picture is already on my side.

How do you set a profit target on a triangle?

On 3 August 2026, a trader on Reddit’s r/technicalanalysis wrote this about the measured move rule: “I don’t use it because I haven’t found it reliable.”

That is a fair point. The rule is simple enough: you take the height of the triangle at its widest part and project that distance from the breakout point. Even Edwards and Magee ranked the triangle’s target as less definite and less reliable than the one for head and shoulders.

So I treat the projected level as a minimum target, and where it lines up with a support or resistance level, I trust it more, while in empty space I trust the old levels over the arithmetic.

Say an ascending triangle has a flat top at 50 and its first low at 44, so it is 6 points tall at the widest part.

Price breaks out at 50, and the minimum target is 56, a 12% move.

If there is an old high at 55, I would rather plan around 55 and treat anything above it as a bonus.

If you want a routine that keeps all of this to a few minutes a day, grab the free 15-minute swing trader checklist.

Which triangles are worth your time?

Before I trade a triangle, I ask what the bigger chart is doing. The first thing is the trend. A triangle inside a big uptrend is really a pause, a pullback that happens to be shaped like a triangle, and in that spot even a symmetrical one can beat 50-50.

The second is location. Triangles often form at the edge of a major support or resistance level, so you will see them near the necklines of double tops, double bottoms and head and shoulders. Then the larger pattern is what you are really trading.

The third is timeframe. Edwards and Magee found weekly triangles usually clear and dependable, and told readers to dismiss the huge, loose ones on monthly charts that take years to finish. My own rules agree, and a big ascending triangle on a weekly chart is one I am happy to trade, with the daily chart used to time the entry.

FAQ

Is a triangle pattern bullish or bearish?
It depends on the type. The ascending triangle is bullish, the descending triangle is bearish, and the symmetrical triangle is neutral and tends to break with the existing trend.

Which triangle pattern is the most reliable?
The ascending and descending triangles, because the flat line gives you a clear level to trade against. The symmetrical triangle is the least reliable, because its breakout is hard to confirm.

When does a triangle pattern break out?
The breakouts that hold usually come about two-thirds to three-quarters of the way to the tip. Past three-quarters, the pattern often drifts into the apex and fails.

Should I enter on the breakout or wait for the retest?
Take the breakout when the prior trend is strong and the triangle is small. Wait for the retest when the triangle is large or fights the prior trend.

How do I set a profit target on a triangle pattern?
Project the height of the triangle at its widest part from the breakout point. Treat it as a minimum target, and check it against nearby support and resistance.

Which of the three triangles do you see most on your charts right now, and do you take the breakout or wait for the retest? Let me know in the comments.

To see the triangle next to every other pattern, read my guide to trading price chart patterns. Its cousins are the expanding triangle and the rectangle pattern, and I explain how to tell the families apart in continuation and reversal patterns. The rest of my free trading guides are here.

If you would like to learn all the different price chart patterns, also check out: “The Definitive Guide to Trading Price Chart Patterns”

And for a routine that does not need you watching every candle, grab the free 15-minute swing trader checklist.

About the author. Spencer Li is The 15-Minute Trader and the founder of Synapse Trading. He is a Certified Financial Technician (CFTe) with 15+ years of trading, run from 70+ countries. He holds a B.Acc and B.BM from SMU. Every trade he takes is public, dated, losses left in. He teaches rules-based swing trading in 15 minutes a day, one system for any market.

Education, not financial advice. Synapse Trading is not licensed by MAS to advise on investment products. Trading carries risk of loss, and past performance is not indicative of future results.

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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.