Diamond Bottom Complete Guide

What is Diamond Bottom?

The Diamond Bottom is a rare but highly potent bullish reversal pattern that typically marks the exhaustion of a significant downtrend. Visually, it resembles a rhombus, formed by the combination of a broadening formation in its first half and a symmetrical triangle in its second half. The pattern begins as prices create higher highs and lower lows, reflecting increasing volatility and indecision between bulls and bears. As the pattern matures, the price range narrows, forming lower highs and higher lows, indicating that the market is consolidating before a decisive move. This structure requires at least 25 bars to develop sufficient complexity and symmetry. According to Thomas Bulkowski in the 'Encyclopedia of Chart Patterns,' the Diamond Bottom is statistically superior to its counterpart, the Diamond Top. Bulkowski’s research indicates a low failure rate of approximately 4% in bull markets, with an average price rise of 36% following a valid upward breakout. Volume typically follows a distinct profile: it is often high and erratic during the broadening phase, diminishes significantly during the narrowing consolidation, and should ideally surge upon the breakout above the upper-right resistance line to confirm the reversal. While Steve Nison's Japanese Candlestick techniques don't explicitly name the 'Diamond,' the price action within the diamond often contains multiple 'Hammer' or 'Morning Star' signals at the lower apex, reinforcing the bullish sentiment shift.

Identification Rules

1. Preceding Trend: A clear and sustained downtrend must exist prior to the formation of the diamond.
2. Broadening Phase: The first half of the pattern must show at least two higher highs and two lower lows with diverging trendlines.
3. Narrowing Phase: The second half must show lower highs and higher lows with converging trendlines, creating the rhombus shape.
4. Breakout Confirmation: A decisive close above the descending resistance line on the right side of the diamond, ideally on high volume.

References

• Thomas N. Bulkowski (2005). Encyclopedia of Chart Patterns.
• Steve Nison (2001). Japanese Candlestick Charting Techniques.

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