Descending Triangle

What it is

A descending triangle has a roughly horizontal support line and a falling resistance line: rallies get weaker while lows hold at the same level.

It is confirmed when a candle closes below the flat line and invalidated by a close above the falling line.

How ClosedCandle detects it

• Built from the last 4–6 confirmed swing pivots, with at least 2 touches on each side.
• Each side is a least-squares line through its pivots; every pivot must sit within 0.5× ATR of its line.
• The lower line is flat (it moves less than 0.6× ATR over the pattern) and the upper line falls.
• The lines must converge: the width at the last pivot is at least 20% narrower than at the first, and the pattern spans at most 150 candles.
• Confirmed when a candle closes beyond the breakout line; invalidated by a close beyond the opposite line, or after 30 candles (sooner if the lines meet first). The measured stop is the last pivot on the opposite side.
• Only closed candles are used; a wick through a line never counts. Once recorded, the detection is never changed.

Full methodology · how setups are measured.