Define the descending triangle before studying its exit: context, boundaries, volume and invalidation belong in the same written research record.
What defines the descending triangle
A descending triangle has a roughly horizontal floor beneath successively lower reaction highs. Keep the floor fixed through separate tests, and draw the falling upper boundary using highs visible at the time. Lower highs describe the changing price structure; they do not reveal the intentions or identity of sellers.
The preceding trend and duration
A preceding decline supports the conventional bearish continuation interpretation. In a broader rising trend the same geometry may be a correction, with an eventual upward resolution. Write down the preceding trend and the nearest longer-term support so the drawing does not become a direction forecast.
Use the same chart interval for every touch. A formation visible on daily candles can contain shorter swings on an intraday chart; those are separate samples. Count the duration and record the touches used, so another reader can reconstruct the boundaries.
A close beyond the boundary
The downward example confirms with a close below the horizontal floor. An intraday low below it followed by a recovery above it does not meet that closing rule. The breakout bar and the next reactions matter more than an increasingly narrow space between the lines.
| Measurement | Value |
|---|---|
| Event session (leftmost bar is session 1) | 44 |
| Boundary at the exit | 60.00 |
| Close of the exit session | 58.85 |
| Distance beyond the boundary | 1.92% |
| Initial formation height | 6.00 |
| Conventional projected level | 54.00 |
Illustrative objective = 60.00 − 6.00 = 54.00The projection is a geometric reference. It is not a price forecast, a probability or an instruction to hold until that level. Describe what would contradict the premise before comparing the potential distance with the risk.
Volume through the formation
Compare volume with this stock’s own recent activity and inspect the bars on which it expands. Contracting activity during a pause and expansion at its exit can support a conventional reading, but volume does not choose the direction. A large session may reflect an event, rebalancing or an isolated trade.
| Measure | Hypothetical value |
|---|---|
| Average, first 5 sessions of the descending triangle | 104.4 |
| Average, last 5 sessions before the breakdown | 54.4 |
| Breakdown session | 190.0 |
| Breakdown ÷ 20-session average | 2.51 |
The displayed relative-volume calculation divides the event’s volume by the average of the 20 sessions ending with that event; it includes the event itself. It differs from a comparison with the prior 20 sessions and from an intraday comparison at the same clock time.
When the conventional reading fails
In the failure drawing a brief move below the floor at 45 reverses, regains the floor and then closes above the falling upper boundary. The lower highs did not prevent that upward resolution. A short thesis based on the floor break needs its own price and time invalidation rules.
Separate this shape from nearby patterns
A rectangle keeps both boundaries horizontal. A falling wedge slopes its floor downward as well as its ceiling, with the ceiling descending faster. Those geometries have different confirmation boundaries.
Record a reproducible chart observation
A useful chart record includes the unsuccessful cases. Define your rules before collecting examples and retain the same price scale, adjustment basis and candle interval throughout the sample.
- Record the preceding swing direction, formation duration and each boundary touch.
- Write the exact close-based confirmation and the opposite boundary or swing that invalidates it.
- Compare event volume with its named denominator, and review both resolving and failed drawings.
- Check whether a scheduled event, such as an earnings report, falls inside the window you are studying; using earnings dates in research covers where such dates come from.
- Inspect the same stock on the Symbol Analysis guide, then record your observations in a trading journal.
These guides teach manual chart interpretation. A near-high or range screen lists candidates to inspect; it does not identify this formation.
Continue with
- Support, resistance and trendlinesHow horizontal levels and sloping lines are drawn and tested.
- Breakouts and pullbacksWhat a close beyond a level shows, and how retests are read.
- Put stock volume in contextCompare a session’s volume with the same stock’s usual activity.
- Candlestick patternsSingle- and multi-session candle shapes read alongside chart patterns.
- Stop-loss and profit targetsWhere invalidation levels and objectives fit in a written plan.
Sources
Read our data and methodology notes for calculation context. This guide explains research tools and observations. It does not recommend a trade or investment.