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1993issue C071-16

Constructing breadth momentum from advance-decline smoothing

Breadth momentum is built from many market components rather than from a single security’s price or volume. Advance-decline oscillators and diffusion indexes are assembled so shrinking participation can appear before a weighted average turns.

  • Breadth momentum is built from many market components, so it can show participation that a weighted index may conceal.
  • A shrinking set of issues joining an uptrend, or fewer issues falling as averages make a new low, is treated as a higher chance that the prevailing move is near a reversal.
  • The work is grouped into advance-decline ratios, diffusion indexes of names in a defined positive trend, and a leftover set that includes high-low data and the Arms index.
  • Longer smoothing spans are more stable but slower, while short spans give earlier signals at the cost of more volatility and false indications.
Entries in this reading3 entries
Current trackMarket breadth120 readingsPrice-indicator divergence142 readingsMoving average449 readings

What breadth momentum is built from

Breadth momentum is built from many market components rather than from a single security’s price or volume. That construction can show participation that a weighted index may conceal.

A shrinking set of issues joining an uptrend, or fewer issues falling as averages make a new low, is treated as a higher chance that the prevailing move is near a reversal.

Three constructions

Breadth-momentum work is grouped into three constructions: advance-decline ratios, diffusion indexes of how many names sit in a defined positive trend, and a leftover set that includes high-low data and the Arms index.

An advance-decline oscillator

A common advance-decline oscillator is a period ratio of advancing to declining issues, often a 10-day span, smoothed with a moving average and recentered so the 50 percent midpoint maps to zero.

A 10-day advance-decline oscillator is presented as a way to warn that fewer issues are taking part in a rally or decline before the average itself turns.

Smoothing spans and unchanged issues

Longer smoothing spans are described as more stable but slower, while short spans give earlier signals at the cost of more volatility and false indications.

Including unchanged issues can keep long-horizon comparisons consistent as listings grow and can flag maturing moves when unchanged names rise as a share of the tape.

10-week and 26-week advance-decline ratios, 1989–1992

Longer smoothing of the advance-decline ratio damps weekly noise but still shows the 1990–91 participation collapse and a much weaker 1992 rebound while the weekly S&P sits near new highs. Values were read from the published weekly oscillator panes, not from a numeric table, and rounded to the nearest five.
Longer smoothing of the advance-decline ratio damps weekly noise but still shows the 1990–91 participation collapse and a much weaker 1992 rebound while the weekly S&P sits near new highs. Values were read from the published weekly oscillator panes, not from a numeric table, and rounded to the nearest five.S&P 500 and NYSE advance-decline · weekly · 1988-11-01T00:00:00.000Z to 1992-06-30T00:00:00.000Z

No printed data table accompanies the weekly panes. Y-values come from the labeled oscillator scales; the 26-week series appears clipped near +200 through late 1989 and again in mid-1991.

A diffusion index

A diffusion index counts the share of a basket meeting a defined trend rule, such as price above a chosen moving average or a rate of change above zero.

Splits from the average

A McClellan-style summation series can be compared with a market average for divergences. A timely trendline break aligned with an average reversal is described as a stronger combined signal.

In one weekly McClellan test, extremes near plus or minus 280, rather than zero-line crosses, were used as a five-week directional hypothesis: plus 280 pointed lower later, minus 280 pointed higher.

Educational research material, not investment advice. Historical source context does not establish present-day performance.
35 of 71 in the Market breadth track
19931-10 pp.Next on Market breadthConstructing a cumulative market-thrust lineThe ordinary advance-decline line is a start-date-dependent running total of advancing minus declining issues, so direction is more informative than the absolute reading.
All readings on this track · 71 readings
  1. 1987How a failed rebound, weak breadth, and cycle dates broke the 1987 bull case
  2. 1988Diagnosing market bottoms with breadth, divergence and averages
  3. 1988Diagnosing index tops with breadth divergences
  4. 1988Record highs versus seven-day breadth and divergence
  5. 1989Constructing a percentage-scaled internals composite
  6. 1989Constructing a weekly block-tick breadth z-score
  7. 1989Constructing a dual-rate advance-decline oscillator
  8. 1989Normalize advance-decline series for a common-scale comparison
  9. 1990Unchanged-issue share as a narrow-breadth case study
  10. 1990Evaluating daily and weekly unsigned plurality breadth
  11. 1990Constructing paired new-high and new-low breadth indicators
  12. 1990Ten-day HI/LO extremes as a long-horizon breadth signal
  13. 1990Confirming index cycles with breadth, volume, and waves
  14. 1990Index cycle gates from breadth and volume
  15. 1990Constructing advance-decline breadth indicators
  16. 1990Weekly advance-decline oscillator: weight map, extremes, and spike cycle
  17. 1990Price-weighted construction distorts breadth, support, and trend
  18. 1991A peak-sequence test from the new-highs-to-advances-ratio
  19. 1991Fuzzy rules that turn daily market-breadth into a session consensus
  20. 1991From daily breadth tallies to a weighted consensus signal
  21. 1991Retesting market-breadth when market structure changes
  22. 1991Constructing TRIN as a breadth-volume ratio
  23. 1991Build the market clock before you read a price bar
  24. 1991A construction audit of the long-horizon trading index
  25. 1991Independent formula timers kept as a testable combination
  26. 1992When identical TRIN prints come from different pairings
  27. 1992Grade closing tick before a next-session breadth hypothesis
  28. 1992Noncumulative advance-decline swing confirmation
  29. 1992Five-day sum construction of the trading index
  30. 1992Daily closing-trin extremes and next-day direction
  31. 1992A three-layer audit: regime, breadth, and group RSI
  32. 1992Constructing a nine-state trend, momentum, and breadth score
  33. 1993Constructing a market-volume-impact rating from nested averages
  34. 1993When advance-decline confirmation counts the wrong universe
  35. 1993Constructing breadth momentum from advance-decline smoothing
  36. 1993Constructing a cumulative market-thrust line
  37. 1994Three-horizon construction of the Haurlan index
  38. 1994Checklist-gated session entry in 1993 index futures
  39. 1994Read one advance-decline pair through three windows
  40. 1994Constructing calibrated market-breadth summation indexes
  41. 1994Constructing a two-speed advance-decline oscillator and a calibrated summation
  42. 1995NYSE tick extremes and candlestick reversal entries
  43. 1995Assembling range, breadth, and a stored stop into one procedure
  44. 1995Restating market breadth timing rules as ratios
  45. 1995Constructing breadth ratio gates after lookback drawdowns
  46. 1995Building a short-range breadth and price oscillator
  47. 1996Constructing a smoothed advance-decline trend filter
  48. 1996Smoothed advance-decline alerts at the 1987 and 1990 turning points
  49. 1996Constructing breadth, RSI, and stochastic range filters
  50. 1996New-high and new-low counts as a breadth construction
  51. 1996Constructing the four-input breadth-volume ratio
  52. 1996Constructing the McClellan oscillator and a calibrated summation index
  53. 1996Declare the oscillator seed, then calibrate only the summation index
  54. 1997Three-gate centered strength in market-breadth construction
  55. 1997Daily advance-decline and new-high new-low breadth signals
  56. 1999Index-fund positions as a majority-vote committee
  57. 2000Tick, tiki and TRIN as a three-layer session confirmation stack
  58. 2000Constructing an advance-decline oscillator from one listed tape
  59. 2001Market breadth, beta, and volume-price confirmation
  60. 2001Regime context from relative venue volume, breadth, and intermarket spreads
  61. 2002When NYSE breadth misreads operating-stock participation
  62. 2003Two-gate breadth divergence and a trend filter for rally tops
  63. 2003Market internals confirm or diverge from the index
  64. 2004Constructing the McClellan oscillator and summation index
  65. 2005Intraday index-futures divergence as a three-part session hypothesis
  66. 2005Breadth summation levels as a short-term signal filter
  67. 2005Checking trend versus range with breadth and divergence
  68. 2011Constructing a Nasdaq hi-lo index from highs, lows, and issues traded
  69. 2013Cumulative advance-decline versus a one-year average
  70. 2013A one-year breadth average as a participation gate
  71. 2015Falsifying a healthy correction with breadth and support
By fieldMarket breadth101 readingsBy year199376 readings
All 120 readings tagged Market breadth
Also on Market breadth5 readings
1988Diagnosing index tops with breadth divergences1988Diagnosing market bottoms with breadth, divergence and averages1991A peak-sequence test from the new-highs-to-advances-ratio1994Three-horizon construction of the Haurlan index2000Constructing an advance-decline oscillator from one listed tape