Overview
Bullish Diamond Bottom
Also known as: Diamond Reversal, Diamond Bottom Formation, Diamond Bullish Reversal
The Bullish Diamond Bottom is a complex reversal formation that transitions from expanding volatility to contracting volatility in a diamond shape, resolving with a bullish breakout as uncertainty transforms into directional conviction.
The Diamond Bottom is essentially a broadening pattern that morphs into a symmetrical triangle. In the first half, price swings get wider (higher highs and lower lows creating diverging trendlines). At the midpoint, the pattern reaches maximum volatility. Then price swings begin contracting (lower highs and higher lows creating converging trendlines). The four trendlines together form a diamond shape. When the diamond forms after a downtrend and resolves with an upside breakout, it signals a major reversal. The transition from expanding to contracting volatility represents the market moving from confusion to consensus, with the breakout direction revealing what that consensus is.
History & Etymology
The Diamond formation was first described by Edwards and Magee in their 1948 classic. It is considered one of the more advanced and challenging patterns due to its composite nature (half broadening, half triangle). Thomas Bulkowski's research confirmed its reversal characteristics, though he noted its relative rarity.
Named for its visual resemblance to a diamond or rhombus when the four boundary trendlines are drawn connecting the swing highs and swing lows.
How It Forms
Formation Steps
- 1First half: price swings widen, forming a broadening pattern (expanding highs and lows)
- 2Midpoint: widest swing of the pattern
- 3Second half: price swings narrow, forming a symmetrical triangle (converging highs and lows)
- 4Combined shape resembles a diamond or rhombus when trendlines are drawn
- 5Breakout occurs above the upper-right trendline
Prerequisites
- Prior downtrend or extended decline
- At least two expanding swings followed by two contracting swings
- Clear diamond shape visible when connecting swing highs and lows
Confirmation Signals
- Breakout above the upper-right converging trendline on volume
- Follow-through buying above the pattern
- Volume increases on the breakout
Invalidation Signals
- Breakdown below the lower-right trendline
- Volume expands on downward moves within the pattern
- Pattern takes too long to resolve
Candle Breakdown
Expanding Phase
Wider price swings creating the broadening first half of the diamond.
Maximum disagreement between buyers and sellers. Volatility spikes as the market searches for direction.
Contracting Phase
Narrowing price swings as the diamond transitions from expanding to converging.
The market begins to find agreement. Volatility compresses as the breakout approaches.
Breakout
Price breaks above the upper-right trendline of the diamond with expanding volume.
Consensus forms in favor of the bulls. The volatility compression resolves with directional momentum.
Psychology
The Diamond Bottom captures the complete cycle from chaos to order. The expanding phase is market confusion at its peak. The contracting phase shows the market gradually finding agreement. The breakout reveals the consensus direction.
Buyer Perspective
Buyers accumulate during the contracting phase as prices stabilize. They gain confidence as volatility decreases and place breakout orders above the upper-right trendline.
Seller Perspective
Sellers are aggressive during the expanding phase but lose conviction as price swings narrow. They cannot push price to new lows in the contracting phase.
Smart Money Action
Institutions accumulate during the contracting phase, taking advantage of the reduced volatility to build positions at consistent prices.
Retail Trader Trap
Retail traders get whipsawed during the expanding phase, give up during the boring contracting phase, and miss the breakout.
Emotional Cycle
Trading Strategy
Aggressive Entry
Enter during the contracting phase when price bounces from the lower-right trendline with a bullish reversal candle.
Conservative Entry
Wait for a confirmed close above the upper-right trendline with volume.
The maximum height of the diamond (widest swing) projected above the breakout point.
1.618x the diamond height.
The prior swing high from before the downtrend.
Best Conditions
- Timeframe: daily
- Timeframe: weekly
- After sharp downtrends that create high volatility
- Market transition periods
- Post-crisis recovery environments
- Asset: stocks
- Asset: indices
- Asset: futures
Avoid When
- Timeframe: 1m
- Timeframe: 5m
- Trending markets where diamonds rarely form
- Low-volatility environments
Confluence Factors
- Diamond at a major support level
- RSI divergence during the contracting phase
- Volume pattern confirms (decreasing then spiking)
- The breakout aligns with sector rotation
Scale In Strategy
Enter 30% in the contracting phase, 40% on the breakout, 30% on a pullback retest.
Scale Out Strategy
Take 40% at the measured move target, trail the remainder.
Risk Management
Volume Analysis
Volume Confirmation
Volume should be highest during the expanding phase, decrease during the contracting phase, and spike on the breakout.
Volume Profile
Decreasing volume in the contracting phase confirms the volatility compression. Breakout volume should exceed the expanding phase peaks.
Volume Divergence
If volume remains high during the contracting phase, the pattern may be failing rather than building energy.
Technical Confluence
Support Resistance
The four trendlines of the diamond create dynamic S/R. The upper-right trendline becomes support after the breakout.
Fibonacci Levels
The diamond often forms near a significant Fibonacci level of the prior trend.
Moving Averages
Moving averages flatten and converge during the diamond. The breakout above the 50 SMA confirms the reversal.
Rsi Confirmation
RSI making higher lows during the contracting phase while price makes equal lows shows bullish divergence.
Macd Confirmation
MACD converging toward zero during the contracting phase and crossing bullish on the breakout.
Bollinger Bands
Bands expand during the first half and contract during the second half, mirroring the diamond shape perfectly.
Vwap
Not particularly relevant for multi-week patterns.
Ichimoku Cloud
Price recovery above the cloud after the breakout confirms the trend change.
Elliott Wave
Diamond bottoms may form as expanded flat corrections in Elliott Wave analysis.
Wyckoff Phase
The diamond can represent a compressed accumulation cycle with the spring occurring at the diamond low.
Market Profile
The diamond creates a complex, multi-modal volume profile that resolves with the breakout establishing a new value area.
Order Flow
Cumulative delta should trend positive during the contracting phase as buyers quietly absorb supply.
Open Interest
Rising open interest during the contracting phase confirms position building ahead of the breakout.
Multi-Timeframe Analysis
Higher Timeframe Alignment
A daily diamond at weekly support maximizes the signal significance.
Lower Timeframe Entry
Use 4-hour chart to time entries within the contracting phase and on the breakout.
Timeframe Confluence
A weekly diamond at monthly support is a rare but very powerful signal.
Top-Down Approach
Monthly support, weekly downtrend ending, daily identifies diamond, 4-hour times entry.
Statistics
Historical Examples
Nasdaq Diamond Bottom 2022
successThe Nasdaq 100 formed a diamond bottom pattern during October 2022, with expanding volatility in September followed by contracting swings in October. The breakout above the upper-right boundary in November preceded the major 2023 rally.
Lesson: Diamond bottoms at major market lows can signal significant trend changes. The key was the volume pattern and the RSI divergence during the contracting phase.
Variations
Asymmetric Diamond
The expanding phase is longer than the contracting phase, creating a skewed diamond shape.
Confusion Matrix
Patterns commonly confused with Bullish Diamond Bottom and how to distinguish them.
Bullish Broadening Bottom
6000% similarIf the pattern only expands, it is a broadening formation. If it expands and then contracts, it is a diamond.
Key Differences
- Broadening bottom only expands; diamond expands then contracts
- Diamond has four trendlines; broadening has two
The Diamond Top is a rare reversal pattern that forms at market peaks, consisting of a broadening formation followed by a contracting formation, creating a diamond shape that signals a shift from expansion to contraction and ultimately a bearish breakdown.
The Bullish Broadening Bottom is an expanding volatility pattern where price makes successively wider swings. When it resolves with an upside breakout above the upper trendline, it signals a powerful reversal higher.
Three White Soldiers is one of the strongest bullish reversal patterns: three consecutive long bullish candles with progressively higher closes, each opening within the prior candle's body, signaling a powerful shift from bearish to bullish sentiment.
The Triple Bottom is a major reversal pattern featuring three distinct lows at approximately the same price level, separated by two intermediate peaks. The breakout above the neckline confirms the reversal and targets a measured move equal to the pattern height.
The Broadening Top (Megaphone) is a chart formation characterized by expanding price swings that create higher highs and lower lows, reflecting increasing volatility and instability at market tops before a bearish breakdown.
The Descending Channel is a chart formation where price trends lower within two parallel downward-sloping trendlines, making consistent lower highs and lower lows in an orderly bearish progression.
Pro Tips & Common Mistakes
Pro Tips
- Diamond bottoms are rare and complex, so do not force the identification on ambiguous patterns
- The Bollinger Bands are your best friend for confirming the expanding-then-contracting structure
- The breakout direction is uncertain until it happens, so wait for confirmation
- Diamonds at major market lows tend to produce the most significant reversals
Common Mistakes
- Seeing diamonds everywhere when the pattern is actually quite rare
- Trading inside the diamond where whipsaws are frequent
- Assuming bullish resolution before the breakout confirms direction
- Using stops that are too tight for the volatile environment within the diamond
Advanced Techniques
- Use Bollinger Band width indicator to quantify the expanding-contracting cycle
- Apply fractal analysis to identify the exact midpoint where expansion transitions to contraction
- Combine with market breadth to confirm the diamond is a genuine market-wide reversal pattern
Institutional Perspective
Institutional traders recognize that diamonds form during periods of maximum market uncertainty. They use the contracting phase as an accumulation opportunity, knowing that the resolution will bring directional clarity and sustained trends.
Fun Facts
- The Diamond formation was considered so complex by Edwards and Magee that they devoted an entire chapter to distinguishing it from other patterns.
- Thomas Bulkowski found that diamond bottoms have a slightly better success rate than diamond tops, likely because the buying pressure at bottoms tends to be more sustained.
Frequently Asked Questions
Diamonds are among the rarer chart formations because they require both a broadening phase and a contracting phase to form properly. On daily stock charts, you might see a few per year across a large universe. They tend to appear more often during periods of major market transition.