What you will learn
- Recognize the most common chart patterns and their meanings.
- Distinguish continuation patterns from reversal patterns.
- Measure targets using the size of the pattern.
- Wait for the completed breakout close before acting.
Why patterns exist
A chart pattern is a recognizable shape formed by price over multiple candles. Patterns exist because collective psychology repeats — periods of accumulation, distribution, hesitation and decision leave similar footprints. Learning to recognize them helps you anticipate what might happen next. But a pattern is a probability tool, not a prophecy. Even the best-looking pattern can fail, so risk management must always accompany pattern trading.
Ascending triangle
An ascending triangle forms when price makes higher lows against a flat horizontal resistance. Buyers keep stepping in earlier while sellers hold the same ceiling. The pattern typically resolves upward because buyer aggression is increasing while the seller line remains fixed. The trigger is a completed close above the horizontal resistance, ideally on above-average volume. The measured target is the height of the triangle projected upward from the breakout point.
Descending triangle
A descending triangle is the mirror — lower highs pressing against flat horizontal support. Sellers are more aggressive at each rally while buyers hold the same floor. It generally resolves downward. The trigger is a close below the horizontal support with volume expansion; the measured target is the triangle height projected downward. In an established uptrend, a descending triangle can still resolve upward, so context matters — do not assume direction from shape alone.
Symmetrical triangle
A symmetrical triangle has both lower highs and higher lows, creating a contracting price range. It is neutral — the market is compressing. The direction of the break usually follows the larger trend, but a symmetrical triangle can resolve either way. Wait for the close outside the triangle. False breakouts are common; a close beyond the opposite side within a few candles typically indicates the true direction.
Flags and pennants
A flag is a small, tight consolidation that appears after a strong directional move (the 'flagpole'). It slopes gently against the trend. A pennant is similar but with converging lines forming a small triangle. Both are continuation patterns — the market pauses, absorbs the previous move, then continues in the original direction. The trigger is a breakout in the direction of the flagpole. The target is often the flagpole's height projected from the breakout.
Head and shoulders
Head and shoulders is a reversal pattern at a market top: a left shoulder (a swing high), a higher head (a taller swing high) and a right shoulder (a swing high near the left shoulder's level). The neckline connects the two intervening lows. A completed close below the neckline confirms the reversal. The measured target is the distance from the head to the neckline, projected below the neckline. Inverse head and shoulders is the bottoming version.
Double top and double bottom
A double top is two peaks near the same price with a valley in between. Sellers repeatedly hold the same level while buyers cannot push higher. Confirmation is a close below the valley low. A double bottom is the mirror — two lows near the same price with a peak in between; confirmation is a close above the peak. Triple tops and bottoms are less common but even stronger when they confirm.
Rectangles and boxes
A rectangle is a horizontal range between clear support and resistance. It shows a battle without a winner. Rectangles can resolve as continuation or reversal — depends on the larger trend. Range-bound traders buy near support and sell near resistance until the box breaks. Once a close occurs beyond the box, the measured target is the box's height projected from the breakout.
Wedges
A rising wedge slopes upward but with both highs and lows converging — bullishness is losing power. It usually resolves downward. A falling wedge slopes downward with converging lines and usually resolves upward. Wedges are counter-intuitive because their surface direction contradicts the eventual break. This is why waiting for the close outside the wedge is essential.
Measured moves and their limits
The 'measured target' — the pattern's height projected from the breakout — is a guideline, not a promise. It often works because the pattern's size reflects the recent volatility. But strong trends can exceed the target easily, while weak breakouts fail before reaching it. Use the measured move to plan partial exits; the final exit should follow structure (a lower swing high in a long trade, for instance) rather than a rigid target.
| Pattern | Type | Typical direction | Trigger | Measured target |
|---|---|---|---|---|
| Ascending triangle | Continuation | Upward | Close above flat top | Triangle height up |
| Descending triangle | Continuation | Downward | Close below flat bottom | Triangle height down |
| Symmetrical triangle | Neutral | Follows trend | Close outside apex | Triangle height |
| Bull flag | Continuation | Upward | Close above flag top | Flagpole height up |
| Bear flag | Continuation | Downward | Close below flag bottom | Flagpole height down |
| Head and shoulders | Reversal | Downward | Close below neckline | Head-to-neckline down |
| Inverse H&S | Reversal | Upward | Close above neckline | Head-to-neckline up |
| Double top | Reversal | Downward | Close below valley low | Height projected down |
| Double bottom | Reversal | Upward | Close above peak | Height projected up |
Practice exercise
Scan the daily charts of ten liquid stocks or indices over the last six months. Identify at least one example each of a bullish flag, a symmetrical triangle and a double bottom. For every example, note the trigger, the measured target and whether the target was reached. Note also the false breakouts — patterns that formed but failed to confirm.
Before you move on
- I have named the pattern type (continuation or reversal).
- I know the trigger — the exact close that confirms the pattern.
- My stop is placed where the pattern is invalidated.
- I have a measured target and know it is a guideline, not a certainty.
- The larger trend supports the pattern's expected direction.
About the author
NISM-Series-X-A Investment Adviser Level 1 examination completed
Amit writes about Indian equity markets, technical analysis, macro themes and the day-to-day mechanics of trading, with a focus on making the flow of global markets legible for retail investors. He has completed the NISM-Series-X-A Investment Adviser Level 1 examination.