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1991issue C051-12

Retesting weighted indicator balances across horizons

A timing system can be audited as one procedure. Each live directional call is scored by later market direction, the hit-rate becomes a statistical-weight, several horizons merge into a composite-balance, and the chi-square-screen is rerun when market structure changes.

  • Each bullish or bearish call is checked against later market direction over a fixed horizon, then hits and misses become a period hit-rate.
  • The hit-rate's significance is mapped to a 0-to-9 statistical-weight and placed in a bullish or bearish pan only while the same-horizon indicator is live.
  • The same tally at 5-, 13-, 26-, and 52-week horizons is merged into one composite-balance and read as an inverted risk gauge, not a statement of how high or low prices will go.
  • Assigned weights change when the sample is refreshed, and a high hit-rate whose chi-square-screen stays reasonably stable across reruns was preferred over ranking rules by total profit.
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From a live call to a statistical-weight

An indicator can be scored by checking each bullish or bearish call against whether the market later moved that way over a fixed horizon, then converting hits and misses into a period hit-rate.

That hit-rate's statistical significance can be mapped to a 0-to-9 statistical-weight, which is then placed in a bullish or bearish pan whenever the same-horizon indicator is live.

Four horizons in one composite-balance

The same weighting tally is run at 5-, 13-, 26-, and 52-week horizons and then merged into one composite-balance.

The composite-balance is meant to be read as an inverted risk gauge that rises near bottoms and falls near tops, so a turn down after a peak was treated as the buy-side condition and a turn up as the sell-side condition.

A short-horizon cluster and a dated risk map

A cluster of three or four 100% short-horizon readings inside three or four weeks was used as a discrete trigger after earlier episodes had been reviewed against subsequent upside breakouts within a month.

Averaging every horizon balance that already speaks to the same future date yields a dated risk map that updates as new readings arrive and does not state how high or low prices will go. That overlay is the multi-horizon-roadmap.

Refreshing the chi-square-screen

Robustness checking compared each indicator's buys and sells with later market direction at those four horizons, then applied a chi-square-screen to ask whether the hit-rate was distinguishable from chance.

Assigned weights change when the sample is refreshed. A long stretch in which about 75% of weeks were up made downside accuracy harder to establish, which is why a later window with a more even mix of up and down weeks was planned after market structure had changed.

Structural-decay and a repeatable relationship

Indicators lose weight or are removed when the activity they measure fades, is distorted by new trading mechanics, or is redefined by reporting changes, while accidental correlations not tied to market behavior are treated as unreliable. That loss of accuracy is structural-decay.

Ranking rules by total profit can favor one large winning episode amid many misses. A high hit-rate whose chi-square-screen result stays reasonably stable across reruns was preferred as evidence of a repeatable relationship.

Educational research material, not investment advice. Historical source context does not establish present-day performance.
9 of 51 in the Robustness testing track
19921-15 pp.Next on Robustness testingConstructing forecast models with regression, walk-forward, and robustnessConstruction begins by choosing independent-variable series, transforming them through preprocessing, and selecting a target-variable that is both usable in a later rule and realistically predictable from those inputs.
All readings on this track · 51 readings
  1. 1986Degrees of freedom in trading system optimization
  2. 1988Walk-forward and neighborhood tests after optimization
  3. 1988Undisclosed rules block system robustness tests
  4. 1988Testing re-optimization calendars against random parameter controls
  5. 1989Binary search limits on multi-peak average grids
  6. 1989Parameter neighborhoods that survive a shift
  7. 1990Use profit mapping to keep a cycle and stop plateau
  8. 1990Why popular indicator optimization fails robustness
  9. 1991Retesting weighted indicator balances across horizons
  10. 1992Constructing forecast models with regression, walk-forward, and robustness
  11. 1992Diagnose regimes before you lock parameters
  12. 1992When stops change system timing
  13. 1993Walk-forward halt rules for forecast models
  14. 1994Walk-forward evaluation of genetic index rules
  15. 1995Input pruning as walk-forward system evaluation
  16. 1995Critiquing neural nets as incomplete trading systems
  17. 1996Rebuild the equity-path ratio before it ranks a designed system
  18. 1996Parameter grids can fit random walks
  19. 1996Walk-forward analysis belongs in the design of a mechanical trading system
  20. 1997When a holdout fails, discard the rule set
  21. 1997Test rewarded rule breaks before replacing the system
  22. 1997Walk-forward rules keep system research from rewriting live trades
  23. 1999Keep a channel-breakout to two lookbacks and test neighbor stability
  24. 1999Constant investment size in stock system evaluation
  25. 2000Forcing optimization maps mechanical system failure boundaries
  26. 2000Robust parameter selection with surface charts
  27. 2001A two-gate classroom test for a two-window momentum trend filter
  28. 2002How a two-sided continuation factor becomes a testable trend rule
  29. 2002Evaluating two-window trend intensity as a reversal rule
  30. 2003Discounting speculative bubbles in system robustness tests
  31. 2003Walk-forward evaluation of locked stochastic oscillator rules
  32. 2003Critiquing mechanical system design after extreme price regimes
  33. 2004Evaluating a two-window trend trigger
  34. 2005Grade backtested signals with holdouts and optimization plateaus
  35. 2006Reserved-sample evaluation of trading system design
  36. 2006Walk-forward critique of hindsight crossover systems
  37. 2008Condition-matched walk-forward evaluation for mechanical systems
  38. 2011Session-split evaluation of regular and overnight systems
  39. 2012Walk-forward evaluation as operator rehearsal
  40. 2013Two-window evaluation of mechanical trading systems
  41. 2013Walk-forward filter selection for repeated-median velocity
  42. 2014Walk-forward evaluation for fading-memory velocity systems
  43. 2015Test oscillator events before tuning rules
  44. 2016Walk-forward evaluation of a five-parameter parabolic stop-and-reversal
  45. 2016Walk-forward optimization without curve fitting
  46. 2017Optimization without overfitting in trend-system evaluation
  47. 2017Parameter stability is a better guide than a larger crossover grid
  48. 2018Point-in-time universes for system evaluation
  49. 2018Walk-forward robustness evaluation for optimized systems
  50. 2018Critiquing breakout systems through robustness tests
  51. 2018A critique of parameter fitting in system design
All 58 readings tagged Robustness testing
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