Chart Patterns — Head & Shoulders, Double Tops, Triangles

Recurring price shapes form because crowd psychology — fear and greed — repeats itself. Learn to spot the setups that show up again and again, and what they tend to signal.

The Concept

Why the Same Shapes Keep Showing Up

A chart pattern is a recognizable shape formed by price over time — not a random squiggle, but a repeating footprint left by the same crowd behaviors: buyers and sellers testing a level, losing conviction, and eventually giving way. Because those behaviors repeat across markets and decades, the shapes they leave behind repeat too.

Patterns broadly split into two camps: reversal patterns (head & shoulders, double tops/bottoms) that suggest a trend is running out of steam and about to turn, and continuation patterns (triangles, flags) that suggest a pause before the existing trend resumes. This lesson covers three of the most widely recognized: the head & shoulders top, the double top, and the triangle.

📐 The Three Patterns

Head & Shoulders
Three peaks: left shoulder, higher head, right shoulder — a break below the neckline signals reversal.
Double Top
Two similar highs fail to break through the same resistance — a break below the middle low confirms reversal.
Triangle
Converging highs and lows compress volatility — a breakout in either direction often follows.

All three share a common thread: they're only "confirmed" once price actually breaks the key line (the neckline for head & shoulders and double tops, either side of the triangle) — until that break happens, it's just a shape that might not finish forming.

📊 Illustrative Walkthrough: A Head & Shoulders Top

Real head-and-shoulders tops don't come with round numbers, so here's a clean illustrative version to see the mechanics clearly — the same logic applies to any real chart.

Point Price Role
Left shoulder$118First peak, uptrend still looks healthy
Neckline (low after left shoulder)$100Key support level to watch
Head$130Higher peak — but often on weaker volume
Right shoulder$117Fails to reach the head's high — momentum fading
Neckline break$99Pattern confirms — reversal underway

The classic "measured move" price target after confirmation is the head-to-neckline distance projected below the neckline: $130 − $100 = $30, so $100 − $30 = $70 as a rough downside target. It's a rule of thumb, not a guarantee.

Watch For This

5 Things to Know About Chart Patterns

  1. A pattern isn't confirmed until the key line breaks — a head & shoulders or double top isn't "done" until price closes through the neckline; plenty of near-misses never confirm.
  2. Volume should support the story — ideally volume fades through the pattern's formation and picks up on the confirming breakout.
  3. The measured move is a rule of thumb, not a promise — it gives a rough target, not a guaranteed destination.
  4. Triangles can break either way — despite looking like continuation patterns, a triangle can resolve against the prior trend, so wait for the actual breakout rather than assuming direction.
  5. Patterns are probabilistic, not mechanical — the same shape "works" more often than random chance, but false patterns and failed breakouts happen regularly.
Put It Into Practice

4 Things to Check Before Trusting a Pattern

📏 Measure the Symmetry

  • Shoulders roughly similar in height, double top highs roughly equal — patterns that look "clean" are more widely recognized by other traders too.

📊 Confirm With Volume

  • A neckline break on high volume is far more credible than one on thin, quiet trading.

🔁 Wait for the Close

  • An intraday poke through a neckline that closes back above it isn't a confirmed break — wait for a decisive closing price.

🧭 Check the Bigger Trend

  • A reversal pattern against a powerful long-term trend is a weaker signal than one that aligns with the broader picture.
Worth knowing: chart patterns describe how crowds have behaved before — they're a probability tool, not a prediction machine. Always pair a pattern with volume, the broader trend, and a risk management plan rather than trading it in isolation.
Activity

Try It Yourself: Head & Shoulders Target Calculator

Enter the neckline and head price from a head & shoulders top — see the classic "measured move" downside target.

Model: measured move = |head − neckline| projected from the neckline in the breakout direction. This is a widely-used rule of thumb among technical traders, not a formula with a guaranteed outcome.

End of Lesson

Quick Check: 5 Questions

Answer all five, then hit "Check My Answers" to see how you did. Get one wrong? No problem — the explanation will show you exactly why.

0/5
Nice work — review any explanations below to lock it in.
1. In a head & shoulders top, what does the "neckline" represent?
The neckline connects the lows on either side of the head — it's the key support level whose break confirms the pattern.
2. What distinguishes a double top from a random pair of highs?
A double top needs two comparable highs rejected at similar resistance, confirmed only once price breaks the low that sits between them.
3. Why can't a triangle pattern be assumed to break in the direction of the prior trend?
Triangles are usually continuation patterns, but they can break against the prior trend — the breakout itself, not the shape alone, tells you the direction.
4. In the illustrative head & shoulders example (neckline $100, head $130), what is the rough measured-move downside target after confirmation?
Head-to-neckline distance is $130 − $100 = $30, projected below the neckline: $100 − $30 = $70.
5. Why should a neckline break on high volume be trusted more than one on thin volume?
Just like any breakout, a high-volume confirmation shows genuine participation rather than a handful of trades nudging price through the line.
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Next Up: RSI

Now that you can spot the shapes price leaves behind, the next step is reading momentum indicators like RSI to see how stretched a move really is.