Former support (before today's ~ 45% fall) was $1.60. Former chart resistance was $3.20.
But this is all obsolete now. The BIN chart needs to be re-calculated.
My most recent large fall was RMD down 21%. Only had 12% of total trading capital on RMD. Sold half, and put the proceeds into another stock trending up. Portfolio recovered the loss within 2 days.