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Technical Analysis

Classical chart patterns

Head and shoulders, double tops, triangles, flags and cup-and-handle — what each one is really describing, and how to measure a target.

Technical AnalysisIntermediate13 min read
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Classical chart patterns have a poor reputation among quantitative analysts, and much of that criticism is deserved — they are subjective, and people find them everywhere. But the good ones survive scrutiny because they describe something real: a specific, recognisable sequence of accumulation, hesitation or exhaustion.

Reversal patterns

Head and shoulders

Three peaks, the middle one highest, with the two troughs between them forming a neckline. The story: buyers push to a new high (left shoulder), pull back, push higher on the head, then on the third attempt fail to even match the previous peak. Each rally recruits fewer buyers. When the neckline breaks, the people who bought all three rallies are trapped.

  • Volume should be highest on the left shoulder and lowest on the right — the visual signature of fading demand. A right shoulder on huge volume undermines the whole pattern.
  • The pattern is not valid until the neckline closes broken. Until then it is three bumps.
  • The measured target is the height from head to neckline, projected down from the break point.
  • An inverse head and shoulders at a bottom works identically in reverse and is, if anything, more reliable.

Double top and double bottom

Price reaches a level, retreats, returns, and fails at the same level again. Simpler than head and shoulders and more common. The second peak failing on lower volume than the first is the confirmation that matters — it means fewer people were willing to pay that price the second time.

Continuation patterns

Flags and pennants

A sharp move (the "pole"), then a short, tight, low-volume drift against it. The story is straightforward: a strong move happens, some early buyers take profits, and the stock consolidates while new buyers absorb that supply. Volume drying up during the flag is essential — it means the profit-taking is being absorbed without difficulty.

Flags are among the most reliable patterns available, and also among the shortest-lived. A flag that lasts more than about three weeks has stopped being a flag and become a distribution range.

20-day average
A long, quiet base followed by an expansion on heavy volume. Volatility contraction preceding volatility expansion is one of the most consistent behaviours in markets — the quiet is not the absence of activity, it is the accumulation.

Triangles

TypeShapeWhat it says
AscendingFlat top, rising lowsBuyers keep paying more while sellers hold one fixed price. Usually resolves upward — the buyers are getting more urgent.
DescendingFlat bottom, falling highsSellers accept less each time while one buyer holds a floor. Usually resolves downward.
SymmetricalBoth convergingGenuine indecision, compressing. Direction unknown — trade the break, do not predict it.

Cup and handle

A rounded, U-shaped base — not a sharp V — followed by a small downward drift near the rim. The rounded bottom matters: it shows a gradual transfer from impatient sellers to patient buyers, rather than a panic low that may be retested. The handle is a final, shallow shakeout of the remaining weak holders before the breakout.

Measuring a target

Target = Breakout price ± Height of the pattern
Height
The vertical distance from the pattern’s extreme to its neckline or base
±
Add for an upward break, subtract for a downward break

Example: A head and shoulders with the head at ₹1,200 and a neckline at ₹1,000 has a height of ₹200. On a break of ₹1,000 the measured target is ₹800. Note the logic: the pattern’s height is a proxy for how much disagreement was resolved, and larger disagreement produces larger subsequent moves.

Using patterns without deluding yourself

  1. 1
    Mark the pattern before it completes, and write the trigger down

    If you can only see the pattern after the move has happened, you did not use it. Note the exact level that would confirm it.

  2. 2
    Require the volume signature

    Each pattern has one: fading volume on the right shoulder, drying volume in a flag, expanding volume on the break. A pattern with the wrong volume profile is a coincidence of shape.

  3. 3
    Take the stop the pattern gives you

    Beyond the right shoulder, beyond the flag’s extreme, back inside the triangle. If price goes there, the pattern has failed and there is nothing to think about.

  4. 4
    Accept that roughly half will fail

    Even good patterns fail often. The edge comes from failing small and succeeding large, not from a high hit rate.

Check yourself

A head and shoulders forms, but volume on the right shoulder is the highest of the entire pattern. How should you treat it?

Simple bhasha mein
Baadal mein shakal

Aasman mein baadal dekh ke kabhi haathi dikh jaata hai, kabhi chehra. Dimaag shakal dhoondhta hai, chahe ho ya na ho. Chart pattern mein bhi yahi khatra hai. Isiliye pattern tabhi maano jab volume aur breakout dono saath dein — warna woh sirf baadal hai.

What to remember
  • Every valid pattern has a one-sentence story about buyers and sellers. If you cannot tell it, skip the pattern.
  • Volume signature is not optional confirmation — it is part of the pattern definition.
  • A double top is not a double top until the intervening low breaks.
  • Triangles should resolve in their final third; one that reaches the apex has failed.
  • Measured moves are expectations, not promises. Around half of good patterns fail.
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Common questions

Short, direct answers to what people ask about this topic.

head and shoulders pattern meaning in stock market
A head and shoulders is three peaks with the middle one highest, and the two troughs between them forming a neckline. The story it tells is demand fading: buyers push to a new high, pull back, push higher on the head, then on the third attempt fail even to match the previous peak. It is not a completed pattern until price closes below the neckline — until then it is three bumps.
the line joining the two troughs of a head and shoulders pattern is called the
The neckline — and the pattern is not considered valid until price closes below it. Volume should be highest on the left shoulder and lowest on the right, which is the visual signature of each rally recruiting fewer buyers; a right shoulder on heavy volume undermines the whole reading. An inverse head and shoulders at a bottom works identically in reverse.
how is the head and shoulders measured target calculated
Measure the vertical distance from the head down to the neckline, then project that same distance downward from the point where price closes through the neckline. That is the classical measured move, and it is a rough projection rather than a forecast — plenty of patterns fall short of it and some run well past. The same arithmetic in reverse gives the target for an inverse head and shoulders.
when is a double top confirmed
Only after the low between the two peaks breaks — not when price merely approaches a previous high for the second time. Until that intervening low gives way you are watching a stock test resistance, which just as often ends in a breakout. The second peak failing on lower volume than the first is the supporting evidence that matters, because it means fewer people were willing to pay that price the second time.
which way does an ascending triangle usually break
Upward, more often than not — a flat top with rising lows means buyers keep paying more while sellers hold one fixed price, so the buyers are the ones getting more urgent. A descending triangle, flat bottom with falling highs, usually resolves the other way, and a symmetrical triangle is genuine indecision with no directional lean. Whichever type it is, the break should come in the final third of the formation; a triangle that drifts all the way to its apex has dissipated its energy and breaks far less reliably.