Diamond Chart Pattern: How to Trade Diamond Tops and Bottoms

The diamond chart pattern is one of the rarest formations in technical analysis, and one of the most frequently misdrawn. Most of the diamonds posted in trading chat rooms are broadening formations that happened to contract, or head and shoulders tops with a sloppy neckline. This guide covers what a real diamond looks like, how to trade the bearish top and the bullish bottom, and what to do when the breakout goes the wrong way.

Key Takeaways

• A diamond is a two-stage formation. Price first broadens into wider swings, then contracts into narrower ones, drawing four trendlines that meet at a left corner, a high, a low, and a right corner.
• A diamond top forms after an advance and typically resolves lower. A diamond bottom forms after a decline and typically resolves higher. The target is the height of the diamond projected from the breakout point.
• The pattern is rare and easy to force onto a chart, so confirmation matters more here than on common patterns. Wait for a close beyond the trendline before committing risk.

What Is a Diamond Chart Pattern?

A diamond chart pattern is a reversal formation built from two opposite phases stitched together. In the first phase price expands: each swing high is higher than the last and each swing low is lower than the last, which draws a broadening formation. In the second phase price contracts: highs come in lower and lows come in higher, which draws a symmetrical triangle. Connect the outer swing points of both phases and you get four trendlines meeting at four corners, and the shape on the chart looks like a diamond tilted on its side.

The structure matters more than the shape. The broadening half tells you the market has lost agreement on price: volatility is rising, both sides are getting aggressive, and neither is finishing the job. The contracting half tells you that argument is burning itself out. By the time the right corner forms, the trend that carried price into the pattern has spent most of its energy, and the breakout from the narrow end tends to run against the move that preceded it.

Diamonds appear on every timeframe but are cleanest on daily and 4-hour charts, where each swing has room to develop. On a 1-minute chart almost any consolidation can be squinted into a diamond, which is exactly the problem. To see where this formation sits alongside the rest of the reversal family, our full chart patterns guide lays out the whole map.

Diamond Top vs Diamond Bottom

Diamond Top: The Bearish Version

A diamond top forms after an extended advance. Price pushes into new highs, the swings get wilder as buyers and sellers fight over an increasingly stretched valuation, then the range tightens as the argument resolves. The signal is a close below the lower right trendline. That break says the buyers who were defending each higher low have stepped away, and the pattern projects a move lower equal to the vertical height of the diamond at its widest point. Tops are the more commonly documented of the two versions, and downside reversals often resolve faster than upside ones.

Diamond Bottom: The Bullish Version

A diamond bottom is the mirror image. It forms after a decline, the swings broaden as the selling becomes disorderly, then the range contracts as sellers exhaust themselves. The trigger is a close above the upper right trendline, and the target is the same height projected upward from the breakout.

Diamond bottoms are genuinely rare, which is why most glossary entries skip them. Capitulation lows tend to be sharp and V-shaped rather than sprawling, so the market rarely spends the time it takes to build a four-corner structure at a low. When one does form, treat it like any bullish reversal that needs a base: it is more reliable when the contracting half sits on a level that already acted as support, and it shares its logic with the double bottom pattern.

How to Identify a Diamond Pattern on a Chart

Five checks separate a real diamond from a shape you talked yourself into.

1. Confirm the prior trend. A diamond is a reversal pattern, so it needs something to reverse. A top requires a clear advance into it, a bottom requires a clear decline. A diamond inside a sideways range is a coin flip.
2. Find the broadening half. You need at least two higher highs paired with two lower lows. If the swings are not genuinely expanding, the left half of the pattern does not exist.
3. Find the contracting half. After the widest point you need at least two lower highs paired with two higher lows. Traders skip this check constantly, and its absence is the main reason a chart labeled diamond is really a broadening formation.
4. Draw four lines, not two. An upper and lower line for the expansion, an upper and lower line for the contraction. If your drawing needs only two trendlines you are looking at a triangle, so compare it against a proper triangle chart pattern first.
5. Check that the corners roughly balance. A diamond where the expansion took three weeks and the contraction took three days is usually a broadening top with a pullback attached.

What Volume Should Do Through the Pattern

Volume separates a structurally sound diamond from a lookalike, and the two halves should have opposite signatures. Through the broadening half, volume should be expanding or at least elevated, because widening swings are the visible result of both sides trading aggressively. Through the contracting half, volume should dry up, because narrowing swings mean participation is falling away.

The breakout should then arrive on a volume expansion. If price slips out of the right corner on volume below the average of the contraction phase, treat the break as suspect. Quiet breakouts from tight ranges fail often, and on a pattern this uncommon you have very few of your own trades to lean on. For keeping volume behavior visible without cluttering the chart, we cover the setups we actually use in our roundup of the best TradingView indicators.

Diamond Pattern vs Head and Shoulders

These two get confused constantly, and for a fair reason: both mark the end of an advance, and a loosely drawn diamond can be redrawn as a head and shoulders with a V-shaped neckline. The practical difference is the lower boundary. A head and shoulders has a neckline, a single roughly horizontal or gently sloping line connecting two reaction lows beneath three peaks. A diamond has no horizontal reference at all; its lows form a V made of two sloping lines that meet at the bottom corner.

The distinction changes your stop. A head and shoulders stop usually sits above the right shoulder, while a diamond stop sits just above the upper right trendline, which is often a tighter and better-defined level. If you can draw a level neckline through the lows, trade it with the mechanics in our head and shoulders pattern guide instead.

How to Trade a Diamond: Entry, Stop and Target

Entry

The standard entry is a close beyond the relevant trendline of the contracting half: below the lower line for a top, above the upper line for a bottom. Use closes rather than intraday touches, because the narrow end of a diamond is exactly where stop runs happen. The more patient alternative is the retest, since diamonds frequently break out and then return to the broken line within a few bars. That gives you a tighter stop and a cleaner invalidation level at the cost of missing the breaks that never look back. Pick one, apply it to every diamond you trade, and let your records tell you which suits you.

Stop Placement

On a diamond top the stop belongs just above the upper trendline of the contracting half, or above the last swing high inside that half if it sits higher. On a bottom, mirror it. Placing the stop outside the widest point of the diamond is technically safer but usually destroys the risk-to-reward, because the pattern is at its widest a long way from your entry.

Price Target

Measure the vertical distance from the highest high to the lowest low of the pattern, then project it from the breakout point. That is the measured move. Two adjustments matter in practice: take partial size at the nearest prior structure level if it sits between your entry and the target, because a rare pattern that reaches half its projection is still a good trade, and expect a major support or resistance shelf to matter more than the projection if the two conflict.

Charting a Diamond Without Forcing It

Drawing this pattern honestly is mostly a discipline problem. Open the daily chart, mark the swing highs and lows first as individual points, and only then connect them. Marking the points before drawing the lines stops you from bending a trendline to make a shape appear. In TradingView the trend line tool with magnet mode enabled snaps to the exact wick extremes, which keeps you honest about where the swings actually printed. Then hide your drawings and look at the bare candles again. If you cannot see the shape without the lines, the shape is coming from your lines rather than from the price action.

When the Diamond Fails

A diamond fails in two recognizable ways. The first is the false break: price closes beyond the trendline, you enter, and within a bar or two price closes back inside the pattern. That reentry is your signal to leave. Waiting for the stop to fill usually means paying the full width of the contraction for information you already had.

The second is the continuation break, where price exits the right corner in the same direction as the trend that built the pattern. This is less a broken pattern than a different one: the diamond acted as a pause rather than a reversal and the prior trend is resuming. Do not fade it. Take the loss at your stop and reassess the chart as a continuation structure.

Common Mistakes with Diamond Patterns

• Calling a broadening formation a diamond. With no contraction half there is no narrow end to break out of.
• Trading it on a low timeframe. Intraday charts produce dozens of diamond-shaped squiggles a week and almost none carry a reversal.
• Ignoring the prior trend. A diamond in the middle of a range has nothing to reverse.
• Entering on a wick. Use closes. The narrow end attracts stop runs.
• Sizing it like a familiar setup. A pattern you see a few times a year deserves smaller size than one you have traded a hundred times, simply because you have less evidence about how you handle it.

Track the Setup Before You Trust It

Here is the honest problem with rare patterns. Over my years of trading I have taken plenty of setups that felt reliable and turned out to be reliable only in memory, because memory keeps the winners and quietly files the losers somewhere else. A diamond might reach your watchlist three or four times a year, which is nowhere near enough repetition to build an instinct, so the only way to know whether you trade it well is to write each one down and check later.

Log the symbol, the timeframe, your entry trigger, your stop, your target and the outcome. After five or six you will have something better than a feeling. If you are starting from nothing, the free trading journal template is a Google Sheets file you can fill in today.

FAQ

Is the diamond pattern bullish or bearish?

It depends on where it forms. A diamond that develops after an advance is a diamond top and is bearish, projecting a move lower once price closes below the lower right trendline. A diamond that develops after a decline is a diamond bottom and is bullish. The shape alone tells you nothing until you know what came before it.

How do you identify a diamond chart pattern?

Look for a clear prior trend, then a broadening phase with at least two higher highs and two lower lows, then a contracting phase with at least two lower highs and two higher lows. Draw four trendlines through those swing points. If the shape has a left corner, a high, a low and a right corner, and volume expanded through the first half and dried up through the second, you have a diamond.

What is the difference between a diamond top and a head and shoulders?

A head and shoulders has a neckline, a roughly horizontal line connecting two reaction lows beneath three peaks. A diamond has no horizontal boundary; its lows form a V made of two sloping trendlines. If you can draw a level neckline, trade it as a head and shoulders. If the lows converge to a point, trade it as a diamond.

How do you calculate the diamond pattern price target?

Measure the vertical distance from the highest high to the lowest low inside the pattern, then project that distance from the breakout point in the direction of the break. Treat prior support and resistance levels sitting between your entry and that projection as realistic partial-exit points rather than assuming the full target every time.

How rare is the diamond chart pattern?

Rare enough that most active traders see only a handful of clean examples per year across a normal watchlist, and bottoms are rarer than tops. That scarcity is the practical risk: because the pattern is uncommon, traders relax the identification rules to find one, which is how broadening formations and messy head and shoulders tops end up labeled as diamonds.