The Bid & Ask

Quotations, Dispatches, and the Daily Tape

Thursday, August 13, 2026

Rejected thesis

Wedge (rising / falling)

The result

Thesis (rejected): A rising wedge (both trendlines slope up, lower steeper, so they converge to the upper right) is a bearish reversal formation. A falling wedge (both down, upper steeper) is bullish. Edwards & Magee / Bulkowski.

Code: research/wedge.py Report: research/wedge_report.json

Why it failed: Edges are ~ 0 across the full universe on both patterns. Even with a 1 % daily-move pre-filter (selects only meaningful breakout days) and ATR-normalised slope/convergence criteria the unconditional edges are noise.

Pattern n 5d edge 20d edge 40d edge
rising_wedge 51,197 -0.18 % -0.03 % -0.09 %
falling_wedge 43,237 +0.16 % +0.57 % +0.50 %

Verdict: Skip. Convergent-trendline patterns at the daily-bar resolution don't predict the direction the textbook claims. The falling-wedge weak positive edge is in the same direction as our broader drawdown-bounce signal but ~5x smaller — covered already.


At a glance
Validatorresearch/wedge.py
VerdictRejected

Every result here is reproducible from the script named above. Reports are in the repository.

Other rejected theses