A triangle is a consolidation pattern. Price stops trending and starts coiling, swinging in a range that narrows as two trendlines close in on each other. It's usually a pause inside a trend rather than a turn, and the trade is the breakout — the close beyond one of the two lines. There are three kinds, and the shape hints at which way price is leaning.
The three types
- Ascending triangle — a flat line across the highs, a rising line under the lows. Buyers keep stepping in higher while sellers defend one price. The bias is upward.
- Descending triangle — a flat line under the lows, a falling line across the highs. Sellers keep pressing lower while buyers defend one price. The bias is downward.
- Symmetrical triangle — both lines converging, highs falling and lows rising equally. No built-in bias; it usually resolves in the direction of the trend that came before it.
Breakout direction
The bias is a lean, not a guarantee. An ascending triangle breaks down often enough that you don't pre-position — you wait for the close beyond the line and trade that. A symmetrical triangle in an uptrend more often continues up, but the honest move is to let price choose and follow.
The cleanest breaks tend to come with room to spare, roughly two-thirds of the way into the triangle. By the time price reaches the apex, the two lines are almost touching, moves are tiny, and false breaks multiply. A break that pulls back to retest the broken line and holds is the higher-quality version — you give up the first burst of the move, but you're now trading with the line behind you rather than in front.
Setting a target
Measure the base — the tallest part of the triangle, at the left — and project it from the breakout point.
Say GBP/USD forms an ascending triangle with a flat top at 1.2700 and a base 150 pips tall. A close above 1.2700 targets 1.2850. At £10 a pip, that's £1,500 if it runs, with a stop back inside the triangle below the last higher low.
Triangles are among the most faked patterns on the chart. A break that closes back inside the lines within a candle or two is a failed break — not an invitation to double down. Size your position for the fact that a fair share won't hold.
Why it matters
Telling a triangle from a reversal keeps you on the right side of the trend. A descending triangle in a downtrend is a chance to join the move at a pause; mistaking it for a bottom and buying the flat line is how traders catch falling knives. The pattern tells you where the decision point is — the break — and lets the market commit before you do. It also gives you a clean place to be wrong: if price closes back inside the lines after you're in, the setup is void and you're out for a small loss rather than arguing with the chart.
The Karnek note
Karnek can't draw a trendline or fire an order — it's read-only and never trades. It logs the breakouts your strategy actually took and how they resolved, so you can measure your fake-out rate instead of guessing at it. Over enough trades, that number tells you whether the setup is worth keeping.
Written and reviewed by the Karnek Research team. Last updated August 2026.
Educational content only - not financial advice. Past performance does not predict future results. Trading carries significant risk.