A “spring” takes price below the low of the TR and then reverses to close within the TR this action allows large interests to mislead the public about the future trend direction and to acquire additional shares at bargain prices.
A terminal shakeout at the end of an accumulation TR is like a spring on steroids.
Shakeouts may also occur once a price advance has started, with rapid downward movement intended to induce retail traders and investors in long positions to sell their shares to large operators.
Seems to be playing out perfectly. Looking forward for next moves