Shakeout

Unlike a breakdown, which starts a new leg lower, a shakeout is a brief dip below support that reverses right back into the range once the stops beneath it are triggered. The dip ends because it accomplished its purpose: the weak hands are out and their shares changed owners.

Stops cluster under obvious levels, and that resting liquidity attracts price. A push through the level fills larger buyers at a discount, which is why shakeouts so often precede the real move up. The practical defense is stop placement below where the crowd's stops obviously sit, or sizing down and using a mental stop with a time component.