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1990issue C011-9

Scoring competing wave counts after a crash

A post-crash chart can carry two live Elliott wave hypotheses at once: a completed-cycle decline and an unfinished fifth-wave advance. Retracement depth, triangle geometry, and the third-wave length rule are used to score which label is still alive.

  • Keep a completed-cycle decline and an unfinished fifth-wave advance on the same post-crash chart, then score which Elliott wave label still fits the structure.
  • After a five-wave decline, recoveries of 38.2 percent, 50 percent, and 61.8 percent are treated as the usual Fibonacci depths, and the observed depth is used to infer relative strength or weakness.
  • A third wave that would be the shortest impulse leg is rejected, and a triangle in a fourth-wave position is read as typically preceding the last advance of the larger trend.
  • Editorial reading: the case study is a scoring workflow for competing labels, not a bull or bear verdict.
Entries in this reading3 entries

Two hypotheses on one chart

Elliott wave analysis is framed as nested five-wave advances and three-wave corrections. A three-wave decline is treated as a correction of the preceding five-wave advance. Editorial reading: a post-crash market is more useful as a two-hypothesis lab than as a place to declare a bull or bear verdict. Keep a completed-cycle decline and an unfinished fifth-wave advance on the same chart, then score which label is still alive.

The completed-cycle decline

One 1987-crash count treated the August 25, 1987 peak as the orthodox end of Cycle Wave V. The December 4, 1987 low was labeled the end of Primary Wave 1 down. Wave 5 of that decline finished above the October crash low, a wave-failure that did not make a new low.

Retracement depth as a score

A rebound from the December 1987 low that only reached the prior uptrend line would have been a 48 percent retracement of Primary Wave 1. The early-1989 break above that line took the recovery to 63 percent. After a five-wave decline, recoveries of 38.2 percent, 50 percent, and 61.8 percent are treated as the usual Fibonacci retracement depths. The observed depth is used to infer relative market strength or weakness.

Editorial reading: retracement depth is a score for whether the completed-cycle decline still fits. A recovery that stalls near a typical depth keeps that label in play. A deeper recovery begins to challenge it. Neither reading is a market call.

The unfinished fifth-wave advance

The competing count keeps Cycle Wave V unfinished. It labels the August 1987 high as Primary Wave 3, the crash as a zigzag Primary Wave 4, and the still-open rise from those lows as Primary Wave 5. From the 1982 lows, Primary Wave 2 retraced only 40 percent and 36 percent into July 1984. Primary Wave 3 then advanced 323 percent and 271 percent, near the 262 percent third-wave multiple on the broader index.

Local waves after the crash

The first two intermediate waves after the crash lasted slightly more than a year. Corrective wave (2) took the form of an upward-sloping contracting triangle with shallow 38 percent and 42 percent retracements.

Ending minor wave 3 on June 8 would make it only 88 percent as long as minor wave 1. That labeling would violate the impulse-length rule that a third wave is never the shortest of the three impulse legs. An extended subdivision instead makes minor wave 3 150 percent and 167 percent of minor wave 1.

Triangle geometry before a last advance

Minor wave 4 first appeared as an irregular flat with only 21.6 percent and 15.6 percent retracements of minor wave 3. The October 13, 1989 spike was then read as possibly the fifth leg of an expanding triangle. That spike printed a 38.2 percent retracement exactly on the broader index and 45.9 percent on the industrial average.

A triangle pattern in a fourth-wave position is described as typically preceding the last advance of the larger trend. The 1986 Intermediate Wave (4) triangle before the 1987 Primary Wave 3 high is used as the prior analog. Editorial reading: the analog is a structural comparison used to keep or reject the unfinished fifth-wave count. It is not a claim that a later advance must repeat.

Educational research material, not investment advice. Historical source context does not establish present-day performance.
2 of 33 in the Triangle pattern track
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All readings on this track · 33 readings
  1. 1986Gold as a double zigzag before a contracting B-wave triangle
  2. 1990Scoring competing wave counts after a crash
  3. 1992Pre-trade checklist for trendline and triangle signals
  4. 1995Chart patterns as tactics, not strategy
  5. 1996Constructing Elliott wave counts with triangles and Fibonacci
  6. 1996A price-channel case study with a pending triangle signal and a planned stop-loss
  7. 1996Expanding triangle as a dual-label fourth-wave reversal worksheet
  8. 1997Rising wedge construction, breakout, and volume
  9. 1997Confirm structure and conditions before naming a Triangle pattern
  10. 1999Drawing the Triangle pattern before Breakout confirmation and the Stop-loss order
  11. 2000Four-phase market cycle triangle breakouts
  12. 2000Continuation triangles as a three-lock experiment
  13. 2001Folding rule: stacking three trendlines on an accelerating swing
  14. 2003A scored symmetrical triangle on a utility stock
  15. 2003Constructing wedges versus flat-boundary triangles
  16. 2004Testing triangle breakouts against volume filters
  17. 2004Mute triangles, histogram force, and trader optimization
  18. 2004Constructing falsifiable reversal and continuation patterns
  19. 2004Construct a corrective rising wedge before treating it as a short
  20. 2004A continuation triangle with Fibonacci targets and an apex stop
  21. 2005Pre-breakout filters for classic chart patterns
  22. 2005Reverse trendlines as a geometry lab for convergence and expanding triangles
  23. 2005Volume shapes versus triangle and double-pattern breakouts
  24. 2005A nested-pattern checklist on the 2005 euro
  25. 2005Volume test for a descending triangle breakout
  26. 2010Constructing triangle, broadening, and head and shoulders patterns
  27. 2011Treat a numeric pattern rank as a shortlist
  28. 2011Evaluating the head-and-shoulders as a falsifiable reversal
  29. 2013Auditing chart patterns by the first post-breakout swing
  30. 2014A three-gate entry for a triangle pullback
  31. 2014Golden triangle: a 50-day pause that still needs both gates
  32. 2014The triangle qualifier came after the rating pre-screen and the fifty-day bounce
  33. 2018Aligning daily, weekly, and monthly triangles with trendlines and Fibonacci retracements
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