A scored symmetrical triangle on a utility stock

A scored hypothesis, not a forecast

Editorially, TradersWeek treats a symmetrical triangle as a scored hypothesis rather than a forecast. The first job is to confirm the triangle-pattern on a scale that keeps the structure readable. A short scorecard then decides whether the setup is worth a long-side case study, while a later head-and-shoulders breakout becomes the exit test.

The archive facts describe that historical workflow. They do not tell a trader what to do in a present-day market.

What counts as a valid triangle

A triangle-pattern is a contracting price range bounded by a downward-sloping upper trendline and an upward-sloping lower trendline that meet at an apex. A valid symmetrical triangle is identified by lower highs and higher lows whose two sloping trendlines meet at a future apex, with at least two distinct minor-high and minor-low touches on each line. Prices that merely pierce a trendline do not count as touches.

What the reviews described

Volume in a typical symmetrical triangle recedes toward the breakout. A breakout is a close outside a pattern boundary that is used to confirm direction and to start measuring the subsequent move. A premature-breakout is a close outside a triangle trendline that quickly returns inside the pattern before the apex.

Upward premature breakouts occur 14% of the time and downward ones 19%, usually near 70% of the way to the apex. Breakouts usually continue the prior trend and typically occur just shy of 80% of the distance from the first touch to the apex. Patterns last at least three weeks and average about two months. In one 255-triangle review, 64% of symmetrical triangles acted as consolidations and 36% as reversals.

A scoring system built from 661 symmetrical triangles, including 365 with upward breakouts, is applied in about five minutes to rank setups rather than to dictate the trade plan.

Make the structure readable first

A logarithmic-scale is a vertical price scale that keeps large yearly ranges from compressing chart patterns into unreadable squiggles. On a 2001 utility-stock chart, switching from an arithmetic to a logarithmic scale made two large symmetrical triangles readable, and the later pattern was spotted two days after its breakout.

The March 2001 triangle showed four top touches and three bottom touches, while the October 2001 triangle showed five touches.

The long-side case and the exit test

In the worked example, the long was filled at 35.10 with an old-high upside of 39 and a 9% downside if the 32 support failed. The stock later formed another upward-breaking triangle in January 2002.

A head-and-shoulders is a three-peak reversal structure whose neckline break is treated as the sell confirmation after an advance. A head-and-shoulders top that began in April 2002 produced the exit when price dropped through round-number support near 40 and pierced a neckline near that same level, with the sale filled at 39.52.

After the sale, price pulled back into the 38 to 39 support zone, recovered to 41, then fell to just over 30. The scorecard had implied a move toward 44.55 from the breakout, while the actual high was 42.68.