Chan Duan Down Complete Guide
What is Chan Duan Down?
The 'Chan Duan Down' (Downward Segment) is a sophisticated bearish continuation pattern derived from Chan Theory (Chán Lùn), a technical analysis framework popular in Asian markets. It represents a structured decline consisting of at least three overlapping 'Bi' (strokes), typically requiring a minimum of 15 bars to satisfy the strict construction rules. The pattern forms when an initial downward move is followed by a corrective bounce that fails to reach the previous high, which is then succeeded by a third move that breaks below the first move's low. This sequence confirms that the bears have maintained control despite a temporary pause. While Chan Theory is distinct from Western analysis, this structure shares characteristics with Thomas Bulkowski’s 'Measured Move Down.' According to Bulkowski’s 'Encyclopedia of Chart Patterns,' similar three-wave bearish structures have a failure rate of approximately 32% in bull markets but perform significantly better in bear markets. Volume typically expands during the downward strokes and contracts during the corrective middle stroke. The reliability of this pattern stems from its requirement to process 'K-line inclusion' (merging overlapping bars), which filters out market noise and ensures the trend's structural integrity before a continuation is signaled.
Identification Rules
- The pattern must be preceded by a clear downward trend and consist of at least three valid 'Bi' (strokes).
- Each 'Bi' must contain at least 5 bars after processing K-line inclusion (merging overlapping highs and lows).
- The second 'Bi' (the upward correction) must not break the starting high of the first downward 'Bi'.
- The third 'Bi' must close below the low of the first 'Bi' to confirm the completion of the downward segment.
References
- Thomas N. Bulkowski (2005). Encyclopedia of Chart Patterns.
- Steve Nison (2001). Japanese Candlestick Charting Techniques.
FAQ
How does 'K-line inclusion' affect the 15-bar requirement?
Inclusion merges bars where one's range is within another's. While 15 raw bars are the minimum, the 'standardized' count after inclusion might be lower, but the structural 3-Bi requirement remains mandatory.
What is the historical success rate of this continuation pattern?
While Chan Theory is qualitative, Bulkowski's data on similar 'Measured Move Down' patterns shows they reach their price targets 60-70% of the time in bearish environments.
Where is the most conservative entry point?
The most conservative entry is the 'Second Class Sell Point,' which occurs at the peak of the second Bi (the corrective bounce) as it starts to turn down.
Does volume play a role in confirming the Chan Duan Down?
Yes, volume should ideally expand on the first and third downward strokes, confirming aggressive selling, and diminish during the second stroke's retracement.
What is the typical price target for this pattern?
The target is often calculated by measuring the vertical distance of the first Bi and projecting it downwards from the high of the second Bi.
More Analysis
Parts of this page (FAQ, introductions) are AI-assisted. Core data and statistics are algorithmically computed. All pattern definitions are human-reviewed.
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