Chart patterns: triangles, flags, double tops, head and shoulders

Recognise the classic chart patterns, know what confirms them (a close through the neckline or boundary), how the measured move is calculated, and why many patterns fail. Gold and Saudi Aramco (2222) examples.

TA 2: Intermediate Lesson 1 of 6 · 4 min read

⚠️ Risk warning: CFDs and leveraged forex are complex instruments with a high risk of losing money rapidly. Most retail accounts lose money. This content is education only, not investment advice or a recommendation.

Gold H4: a double top, the neckline break and the measured move3,8993,9283,956XAU/USD · H4Neckline 3,931Measured move ≈ 3,894−3737Top 1Top 2Close belowRetestHeight 3,968 − 3,931 = 37, projected down from the neckline. A reference for planning, not a target.
Gold H4: a double top, the neckline break and the measured move Illustrative chart: drawn data, not real prices.

A chart pattern is a shape that the swing points of market structure often make before a trend continues or turns. Patterns are useful because they give you a clear level where the idea is confirmed and a clear level where it is wrong. They are not a forecast: plenty of patterns never complete, and completed ones often fail.

Reversal patterns

  • Double top: two highs at roughly the same level with a pullback low between them. That low is the neckline. The pattern is only complete when price closes below the neckline. A double bottom is the mirror image.
  • Head and shoulders: a high (left shoulder), a higher high (head) and a lower high (right shoulder). The line through the two lows between them is the neckline. In market-structure terms, the right shoulder is a lower high and the neckline break is a break of structure. The inverse version forms at lows.

Continuation patterns

  • Flag: a strong, fast move (the pole) followed by a small channel that drifts gently against it. A bull flag drifts down or sideways after a rally; a bear flag drifts up after a drop.
  • Triangles: price makes a series of smaller swings between two converging lines. An ascending triangle has a flat top and rising lows; a descending triangle has a flat bottom and falling highs; a symmetrical triangle has both lines sloping towards each other. Treat the break of a boundary as the event, not the shape.

The measured move

Traders project a pattern's height from the breakout point: for a double top, the distance from the highs to the neckline, subtracted from the neckline. It is a reference for planning, for example to judge whether a trade's reward is worth its risk. It is not a target price will reach.

Worked example: gold (XAU/USD), H4. The figure uses drawn prices. Gold rallies to 3,968 (top 1), pulls back to 3,931 and climbs again to 3,965 (top 2), slightly lower. The 3,931 low is the neckline. Nothing is confirmed until a candle closes below 3,931; here that happens a few bars later. Price then rallies back to about 3,934, just above the old neckline, and fails: a retest from below. The height is 3,968 − 3,931 = 37, so the measured move projects about 3,894. In this drawing price reaches it; on real charts it often stops well short, or the break fails and price returns above the neckline.

Why patterns fail, and what to do about it

  • Seeing them too early. Two highs are not a double top until the neckline breaks. Many "double tops" simply become a range or a continuation.
  • Ignoring the trend. A bull flag inside a strong D1 uptrend is a different proposition from one against it.
  • No invalidation level. Decide before entering where the pattern is wrong: for a double top, typically above the second high or back above the neckline after the break.

This lesson is educational. Patterns describe what price has done; none of them guarantees what price will do next.

🛠️ Practice task

Use a real chart. This is for practice, not for placing a trade.

  1. Open gold (XAU/USD) on H4 in TradingView or MT5 and scroll back three months. You can check the live price on the Invvex gold page.
  2. Find one double top or double bottom and one flag. Draw the neckline or the flag channel.
  3. For each, write down: the confirmation close, the invalidation level and the measured move.
  4. Check what happened next. Did the pattern complete? Did price reach the measured move, stop short or fail?
  5. Repeat on Saudi Aramco (2222) daily. Note how many "patterns" never broke their neckline.

🎯 Mark this chart

Study the drawing, pick the letter, then check. This exercise does not count toward your progress; the quiz below does.

Saudi Aramco (2222) D1: find the bull flag24.9825.6526.332222.SR · D1ACBD
Saudi Aramco (2222) D1: find the bull flag Illustrative chart: drawn data, not real prices.
Saudi Aramco (2222), daily. Which box is a bull flag?

Show answer

B: the small drift lower after the sharp rally. A flag is the pause after the pole. C is the pole (the strong move), B is the small channel drifting against it, and the break out of B continues the rally. A is a base before any pole, and D is a range at the highs that does not follow a fresh pole.

Saudi Aramco (2222) D1: find the bull flag24.9825.6526.332222.SR · D1ACBD✓ Bull flagPole
Solved: B is the flag, after the pole in C Illustrative chart: drawn data, not real prices.

✍️ Quick quiz

Check what you learned. Your answers stay in this browser.

1. When is a double top complete?

Show answer

When price closes below the neckline. Two highs alone are not a pattern. The close below the low between them (the neckline) completes it.

2. A bull flag is…

Show answer

A sharp rally followed by a small channel drifting down or sideways. The flag is a pause after a strong move (the pole), drifting gently against it.

3. Highs at 3,968 and 3,965, neckline at 3,931. What does the measured move project?

Show answer

About 3,894. The height is about 37; subtracted from the 3,931 neckline it gives about 3,894. It is a reference, not a promise.

4. What is the most useful thing a pattern gives you?

Show answer

A clear level where the idea is confirmed and a level where it is wrong. Patterns help you plan: where to act and where to admit the idea failed.