Triangles, Ascending

Core idea

An ascending triangle has a flat upper trendline along the highs (resistance) and a rising lower trendline along the lows (rising support). The shape suggests a stock that meets a constant supply ceiling at one price while buyers grow progressively more willing to chase at higher floors. Eventually one side wins: usually the buyers, who push price above the ceiling on a breakout.

The textbook reading is bullish. The statistical reality is less impressive. Bulkowski ranks ascending triangles at 16 of 20 for performance with upward breakouts in bull markets, and worse for downward breakouts. Failure rates (the percentage of patterns that fail to move more than 5% after the breakout) are dreadful — 27th and 35th out of 39. The pattern is famous, plentiful, and only modestly profitable.

Why it matters

Despite the underwhelming stats, the ascending triangle teaches the cleanest possible model of supply and demand in equilibrium. A large institutional seller is dumping shares at a fixed price (the ceiling). Each time buyers absorb a tranche, demand recovers and price rebounds — but on each successive rally, more buyers are willing to bid earlier, raising the floor. When the seller runs out of shares, the ceiling vanishes and price gaps up.

Even if you never trade the pattern, recognizing it tells you something is being distributed at that price. That alone is worth knowing.

The five-touch rule

The single biggest source of false ascending triangles is too few trendline touches. Bulkowski requires at least five touches — three on one trendline, two on the other, each at a minor high or low. Slicing through a trendline at the start or end of the pattern doesn't count. Without five touches you don't have a triangle; you have a rounding bottom with horizontal resistance, which behaves differently.

Whitespace as a tell

A valid ascending triangle has price filling the triangle — bouncing top to bottom several times. If there's a large white region in the middle, you've drawn the trendlines around something that isn't a triangle. Reject it and look elsewhere.

Key takeaways

Mental model

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Practical application

Trading the breakout

When to skip

• Less than five trendline touches.
• Major whitespace in the center.
• Strong overhead resistance within 10% of the ceiling.
• The broader market is in a clear downtrend.
• Volume is rising into the breakout and the breakout fails to close outside the trendline.

Example

A mid-cap tech stock has run from $30 to $48. From May through July it forms an ascending triangle with the ceiling at $50 and a rising lower trendline from $44 (May low) through $46 (June low) to $48 (mid-July low). There are three touches at $50 and three on the rising line — six touches total. Volume tapers from 800k average to 250k by late July.

• Entry trigger: daily close above $50.
• Stop: $47.90 (below the late-July rising-line touch). Risk: about 4%.
• Measure rule: height = $50 (start high) − $44 (start low) = $6. Target = $50 + $6 = $56. A 12% move.
• Risk-reward: 1 : 3, attractive given that two-thirds of trades hit the target.
• Throwback management: about 60% chance of a throwback to $50 within two weeks. Hold unless price closes below $50 for two consecutive days.

The check-before-entry: there's a prior peak at $54 from earlier in the year. That's between entry ($50) and target ($56), so realistic expectations might mean taking half the position off at $53.50 and letting the rest run.

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