Symmetric Triangle
A symmetrical triangle forms when highs step lower and lows step higher, compressing price into an apex. It is a neutral pattern: the compression signals an imminent expansion in volatility without indicating direction.
- Bias
- Neutral / directionless
- Category
- Chart Patterns
- Scan cadence
- Every close
What has to be true for a Symmetric Triangle to trigger
- A sequence of lower highs
- A sequence of higher lows
- Both boundaries converging at a comparable rate
- Price respecting both lines rather than piercing them repeatedly
- Volume typically contracting into the apex
How PatternGrade grades it
Cleaner convergence, tighter adherence to both trendlines, and clearer volume contraction raise the grade.
Every scanner grades its hits A+, A or B from the pattern's own measurable structure. The grading is deterministic — the same chart always produces the same grade. It describes how closely the chart matches the pattern, not how likely anything is to happen; no hit rate or probability is attached to a grade. The reasoning is set out in the methodology.
What a Symmetric Triangle looks like in practice
After a sharp move, a stock's highs step down from $88 to $84 to $81 while its lows step up from $70 to $74 to $77. Five weeks in, the range has narrowed from 18 points to four, volume has fallen by half, and the two converging lines meet about two weeks ahead. Price is coiling with no directional bias visible in the structure itself.
How a Symmetric Triangle fails
There is no single failure, which is the pattern's defining weakness. It is directionless by construction, so a break either way is a valid resolution. The practical failure is the whipsaw: price breaks out, reverses within two or three sessions, and breaks the other way. Triangles that resolve very near the apex are especially prone to this, because by then the range is so tight that ordinary noise is enough to trigger a break. Volume on the break is the main filter.
What this pattern is telling you
A symmetrical triangle carries no directional bias. Treating it as bullish because the market is rising is reading the market, not the pattern.
PatternGrade is not a financial advisor and does not give buy or sell recommendations. Targets and stops shown on a pattern are reference levels derived from its geometry, not advice.
How to scan for Symmetric Triangle setups
PatternGrade rescans every liquid US stock (~4,500 names) for this pattern after every close and returns the hits as a graded list, with the pattern drawn on each chart, so you review setups rather than hunt for them.
Join the waitlist to be invited when sign-ups reopen and see the current Symmetric Triangle list, or browse all 75 patterns.
Symmetric Triangle FAQ
Which way does a symmetrical triangle break?
Either. The pattern signals compression and an approaching volatility expansion, not direction, which is why PatternGrade classifies it as neutral rather than bullish.
Which way does a symmetrical triangle break?
It has no inherent bias, and that is why PatternGrade classifies it as neutral rather than bullish. The common claim that it usually continues the prior trend is weaker than it sounds; the honest reading is that the pattern tells you volatility is compressing and a move is likely, not which way it goes.
Where in the triangle should the breakout happen?
Conventionally between half and three-quarters of the way to the apex. Breaks in that zone still have room and momentum behind them. Breaks right at the apex are more prone to whipsaw, and PatternGrade's grade accounts for where in the structure the break occurs.
How is a symmetrical triangle graded if it has no direction?
The grade measures structural quality, not direction: how cleanly the boundaries are defined, how many valid touches there are, whether volume contracts as expected, and whether there is room left before the apex. A well-formed triangle can grade A+ and still break either way.
How long does a symmetrical triangle take?
Typically three weeks to three months on daily bars. Shorter than that and it is usually a pennant; much longer and the converging lines tend to lose their meaning as price wanders between them.
Patterns a Symmetric Triangle is mistaken for
- Ascending Triangle
- An ascending triangle has a flat ceiling and a rising floor, which gives it a bullish lean. A symmetrical triangle has both boundaries converging and no lean.
- Descending Triangle
- A descending triangle has a flat floor and falling ceiling, giving it a bearish lean. Symmetrical has neither boundary horizontal.
- Pennant
- A pennant is a very short converging consolidation immediately after a sharp move, days rather than weeks. A symmetrical triangle is a larger, slower structure with no pole requirement.
- Bollinger Squeeze
- A squeeze is an indicator reading of contracting volatility. A symmetrical triangle is a price structure with two identifiable converging boundaries. Triangles usually produce squeezes; squeezes do not imply triangles.
Last reviewed . Structure and grading for the Symmetric Triangle are reviewed against the scanner's own rules.