Chart Patterns Explained: Head and Shoulders, Double Top, Triangles, Flags and Wedges
Lesson 3 of 10 · Intermediate
The logic behind chart patterns
Classic chart patterns are a compressed picture of the struggle between buyers and sellers. They are usually split into two groups: reversal patterns such as head and shoulders and double tops or bottoms, which raise the possibility of a change of direction, and continuation patterns such as flags and most triangles, which show a temporary pause inside a trend. No pattern is complete before the confirmation line, such as the neckline, is broken, and many “forming patterns” never finish.
Every pattern has three components that should be defined before any decision: the confirmation point (where the pattern becomes active), the invalidation point (where it stops being valid) and the measured target (a rough estimate of the size of the move). Targets are rough guides, not promises; price may stop far earlier or run much further.
Head and shoulders and inverse head and shoulders
A head and shoulders top consists of three peaks: the left shoulder, the head (the highest peak) and the right shoulder, which sits lower than the head. The lows between these peaks are joined to form the neckline. The logic is that at the right shoulder buyers can no longer make a new high, and the sequence of higher highs fails. The pattern is confirmed when price closes below the neckline.
Measured target: measure the vertical distance from the top of the head to the neckline and project it downward from the neckline break. Hypothetical example: the head is at 3940 and the neckline beneath it is at 3880, so the height is 60 dollars. If the neckline breaks at 3880, the rough target is 3820. A logical invalidation point is above the right shoulder.
The inverse head and shoulders is the same structure at a low and is confirmed by a break of the neckline upward. A sloping neckline is valid too, but with a downward-sloping neckline on a top pattern the break comes later and at a lower price, so part of the move has happened before confirmation.
Double tops and double bottoms
A double top forms when price reaches roughly the same area twice and is rejected both times. The low between the two peaks is the confirmation line. Until that low is broken, the structure is only a retest of resistance, not a double top. This is the most common mistake with this pattern: many uptrends are full of retests that eventually break higher.
Measured target: project the height from the peaks to the middle low downward from the break of that low. The double bottom is the mirror image. A variant in which the second peak pokes slightly above the first and then quickly reverses is very common in gold and is sometimes considered a more telling version of the pattern, because it shows buying failed to follow through above the earlier high (a liquidity sweep or “stop run” above the prior high).
Triangles
- Symmetrical triangle: lower highs and higher lows; volatility compresses with no clear edge. It usually breaks in the direction of the prior trend, but that is only a tendency.
- Ascending triangle: a roughly flat top with rising lows; buyers step in earlier each time and horizontal resistance is under pressure.
- Descending triangle: a roughly flat bottom with falling highs; the mirror image of the ascending triangle.
Measured target: take the height of the widest part of the triangle (its start) and project it from the breakout point in the direction of the break. A common rule of thumb is that breakouts very close to the apex, where the two lines have nearly converged, are lower quality, because the compressed energy has largely been released and price often slides out the side instead of breaking cleanly.
Flags, pennants and wedges
A flag forms after a sharp move, the flagpole: a small channel, usually sloping against the pole, with smaller range and lower volume. A pennant is the same idea, but the body is a small triangle. The common measured target is the length of the pole projected from the flag breakout in the trend direction. A flag that drags on too long or retraces more than about half of the pole is usually no longer a flag.
A wedge resembles a triangle, except both lines slope in the same direction. A rising wedge (both lines up and converging) leans bearish, because each new high is made with less progress than before; a falling wedge leans bullish. A conservative target for a wedge is a return to where it began.
Where patterns work and where they do not
Patterns are easier to read on higher timeframes and during heavy participation. On very short timeframes noise is high and you can find almost any shape on a chart. The success statistics quoted in different sources vary greatly with the market, the period and the exact pattern definition, so do not accept any number without testing it on your own data. False breakouts are a normal part of pattern behavior, and the only way to live with them is to define the invalidation point before making a decision. A pattern that forms against the higher-timeframe trend, such as a double top on the 5-minute chart inside a daily uptrend, usually has a more limited reach.
Common mistakes
- Acting on the pattern before confirmation, meaning before the neckline or middle low breaks.
- Seeing patterns everywhere because you want to find one.
- Treating the measured target as a price that will certainly be reached.
- Ignoring the higher-timeframe trend when interpreting a small pattern.
- Having no defined invalidation point and hoping the pattern will eventually work.
What does volume say here?
Classic analysts have always looked at volume within patterns: in a head and shoulders top, volume is usually lighter at the right shoulder than at the head, and in a flag, volume contracts inside the flag body. Modern tools make this more precise. Consider a triangle breakout: if price pokes above the upper line but the volume profile shows almost no trading outside the triangle and price quickly falls back inside, that is a lack of acceptance and a weak breakout. If, after the breakout, the value area shifts higher and price builds time and volume above the line, the breakout has been accepted.
In a double top, comparing the delta of the two peaks is useful: if there was heavy aggressive buying on the second peak and price still could not go higher, that suggests passive sellers absorbed the buying. This evidence is not decisive either, but it often gives information before the pattern completes and helps you drop weak patterns sooner. As always with gold, real volume and delta come from COMEX GC futures (converted to XAUUSD with the basis), not from CFD tick volume.
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Frequently asked questions
How reliable are measured targets for patterns?
Targets are rough estimates of the size of a move, not guaranteed prices. Many traders treat them as just one area to review alongside support and resistance and volume structure.
Which pattern is the strongest?
There is no fixed ranking, and published statistics differ widely by market, period and pattern definition. The quality of each instance, meaning timeframe, trend context and volume behavior, matters more than the pattern's name.
Is a head and shoulders with a sloping neckline valid?
Yes, but the slope affects the timing and price of confirmation. With a downward-sloping neckline on a top pattern, confirmation comes later and part of the move has already happened.
Education only, not a recommendation to buy or sell; we never give signals. Price examples are illustrative. Test any method on a demo account first, with strict risk management.