Trading strategies · Intermediate

Classic Chart Patterns Explained

A recognisable shape is a hypothesis with a measurable risk attached, and measuring it before entry is most of what makes patterns worth using.

Last reviewed 15 September 2026 by the MarketPro research desk · Editorial policy

In short

Chart patterns are shapes formed by price over time that traders use to frame a hypothesis about continuation or reversal. A head and shoulders with a head at 0.9120 and a neckline at 0.8950 has a 170-pip height, giving a measured target of 0.8780 from the break and a stop above the right shoulder. Measuring the pattern before entry is what turns a shape into a trade.

What to remember

A textbook pattern is not automatically a good trade. The worked head and shoulders offers 155 pips of reward against 130 of risk.
The measured move projects the pattern height from the breakout, which gives a target proportional to the structure rather than a round number.
Two traders draw two necklines, and on a small pattern that 20-pip difference can flip the trade from viable to not.
A failed pattern only costs one planned loss if the invalidation was a specific price written down before entry.

Lesson 10 of 24 in Trading strategies

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A head and shoulders, priced out from neckline to target

Chart patterns are shapes price draws over days or weeks that traders use to frame a hypothesis about what happens next. The most useful way to understand them is to see one measured, because the measurement is what turns a shape into a trade with a defined risk.

USD/CHF forms a left shoulder at 0.9050, a head at 0.9120, a right shoulder at 0.9055, with the neckline running across the two intervening lows at roughly 0.8950. The pattern height is the distance from the head to the neckline: 170 pips. The conventional measured target is that height projected down from the break, giving 0.8780.

Entry on a close below the neckline, say 0.8935.
Stop above the right shoulder at 0.9065, which is 130 pips away and is the price at which the pattern has plainly failed.
Target 0.8780, which is 155 pips of reward against 130 of risk.

That ratio is just under 1.2 to 1, which is worth noticing. A textbook pattern does not automatically produce an attractive trade, and the only honest way to know is to measure it before entering rather than after. Patterns with the stop tucked closer to the neckline improve the ratio and increase the chance of being shaken out by a normal retest.

Reversal shapes and what each one is describing

Head and shoulders. Three pushes, the middle one highest, the third failing to match it. It describes buyers running out of capacity to make new highs.
Double top and double bottom. Two attempts at the same level, both rejected. Shorter to form and easier to misidentify, since two touches of a level is also just a range.
Rounding tops and bottoms. A gradual change of slope with no single decisive moment, which makes entry timing awkward and the stop expensive.

Continuation shapes and the pause they record

Flags, pennants and triangles describe a market catching its breath. After a sharp directional move, price consolidates in a tight, often counter-sloping range while positions change hands, then frequently resumes in the original direction.

11 more sections in MarketPro

Pattern	Shape	Measured move
Bull flag	Sharp rise, then a tight downward drift	Height of the pole added to the breakout
Pennant	Sharp move, then a small symmetrical triangle	As above, with a narrower consolidation
Ascending triangle	Flat resistance, rising lows	Triangle height added to the break

The measured move is a convention rather than a rule. It gives a target that is proportional to the pattern that produced it, which is more defensible than a round number, and it is wrong often enough that taking partial profits earlier is a reasonable adjustment.

Two traders, two necklines, two different trades

Pattern recognition is subjective and that subjectivity has a cost. One trader draws the neckline across the lowest wicks, another across the closes, and their entry prices differ by 20 pips on the same chart. On a pattern where the risk is 130 pips that matters at the margin. On a smaller pattern it can flip the trade from viable to not.

Worse, the human eye finds shapes in noise, which is what it evolved to do. A right shoulder that only becomes visible once you have decided you want a short is not evidence. The defence is procedural: define the pattern's components in writing, require all of them before the pattern counts, and draw the lines before deciding whether you like the trade.

What a failed pattern costs if you never defined failure

Patterns fail routinely, particularly in volatile or news-driven conditions where the orderly behaviour they describe is overwhelmed by a flow that does not care about the shape. A head and shoulders that breaks the neckline, then recovers back above it, has not become a slower head and shoulders. It has failed, and the traders positioned short are now the fuel for the move against them.

The invalidation has to be a price, written down before entry. In the example above it is 0.9065. Not "if it looks wrong", not "if it comes back". A specific level, sized so that being wrong there is a planned and affordable outcome. The position size calculator turns the 130-pip distance into a position, and the risk management guide covers what proportion of the account that loss should represent.

A short checklist before trading a shape

Does the pattern have every component, drawn before you formed a view?
Is there a preceding trend for a reversal pattern to reverse, or a preceding move for a continuation pattern to continue?
What is the measured height, and does the resulting reward justify the stop that the structure requires?
What price means the pattern has failed, and is that loss one you have sized for?
Is there scheduled data during the expected holding period that could override the whole picture?

Chart patterns are a way of organising a hypothesis and assigning it a risk. Nothing about a recognisable shape makes the outcome predictable, and the value in them comes almost entirely from the discipline of measuring the trade before taking it.

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Written and reviewed by the MarketPro research desk

MarketPro is a trading-signal and trading-education app operated by Harajuku Holdings LTD (Cyprus). Our signal desk publishes and tracks every trade idea in-app, and every page here is checked against the app's live behaviour before publishing. Last reviewed 15 September 2026. How we produce signals and content · About MarketPro

FAQ

Classic Chart Patterns Explained: questions

What is the most reliable chart pattern?

No pattern has a dependable outcome, and any ranking you see is usually drawn from a specific market and period rather than a general property. What varies more usefully is how clearly a pattern defines its own failure point. Head and shoulders and rectangles give a specific price where the idea is finished, which makes them easier to trade responsibly than shapes with vague boundaries.

How do you calculate a chart pattern target?

The standard convention is the measured move: take the height of the pattern at its widest point and project that distance from the breakout level. For a head and shoulders that is the distance from the head to the neckline, and for a flag it is the length of the pole. Treat the result as a reference rather than a forecast, since patterns frequently stop short of it or run well past.

Why do chart patterns fail so often?

Because they describe an orderly balance between buyers and sellers that can be overwhelmed at any moment by flow that does not care about the shape, particularly around economic data or central bank decisions. Patterns are also drawn subjectively, so some of what looks like failure is really a pattern that was never properly formed. Defining the invalidation price in advance keeps a failure to one planned loss.

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Not investment advice. Past performance is not indicative of future results.