Definition
A partial decline is a price move that begins at the upper boundary of a consolidation pattern, such as a rectangle or broadening formation, heads down toward the lower boundary, but reverses before actually touching it. The decline is incomplete, hence the name.
This behavior is treated as a forward-looking clue. When price refuses to fall all the way to support and turns back early, it suggests that sellers are weak and buyers are eager, conditions that frequently precede an upward breakout through the top of the pattern.
Why it matters
How it works
For a partial decline to count, price must first establish a valid consolidation by touching both boundaries multiple times. The partial move then starts from the top trendline and reverses somewhere in the middle of the range without reaching the bottom.
Analysts confirm the signal only when price subsequently breaks above the upper trendline. Until then, the partial decline remains a hypothesis. Its mirror image, the partial rise, performs the same anticipatory role for downward breakouts.