Do you see that red candles out of the Bollinger Bands? It happens when the price movement is not natural, panic selling, manipulation etc.
Anyway, we have to deal with it. The 50% line (mid line) of the gray support area should hold as support, or its will turn to be probably tribble. Although the ultimate bot in order to don't go down to $4000 should be the 3D EMA200, 3D candles close should be above EMA200 area. You can check my previous ideas for 3D charts and a more comprehensive explanation.