Bnx's shocking waterfall fell from around 1.3 to around 0.85 two days ago. This is a very violent range, indicating that the main force has already smashed the market to sell.
However, it is difficult for the main force to sell all its chips in a wave of sharp declines, so it will rebound and continue to sell after a second pull-up. Therefore, the market will currently rebound to around 1.03-1.06 and continue to smash the market to sell waterfalls!
This is why there is often a second attack after the big waterfall and big positive line.