Descending Triangle

Flat support tested several times below falling swing highs; completes on a close below support.

A descending triangle mirrors the ascending triangle: a horizontal lower boundary and a falling upper boundary. Rallies fail at lower highs while buyers defend the same level, until support breaks. It is classified as a bearish pattern.

Failed breakdowns can turn the old support into a springboard (Kibar: "recovery above support = failed breakdown").

How we define it

Support: a best-fit horizontal level through at least 3 swing lows (2 on 1W)
Resistance: a falling line through at least 3 swing highs from the pattern high; no close above it
The range narrows to at most 60% of its starting height; the breakdown comes before 3/4 of the way to the apex
Minimum length: 2 months on 1D, 3 months on 1W, 10 days on 4H (from the first boundary test to the breakout or breakdown)
Breakout (up) / breakdown (down): the first candle close above the upper boundary or below the lower boundary by at least 3% on 1D and 1W (1.5% on 4H), following Edwards & Magee
Failed breaks: a breakout or breakdown that closes back inside the boundary within 6 candles on 4H, 5 on 1D or 3 on 1W is removed from the list
Trend filter: breakouts only above the 200-period EMA (40-week EMA on 1W), breakdowns only below it
Watchlist: the pattern meets the length and test rules, has not broken yet, and price is within 3% (or 1 ATR, at most 6%) of the boundary