How far??? fear is many times stronger than greed and markets always drop faster than they rise so with fear running rampant due the media talking coronavirus everywhere and everyday the drop will be continous...I wouldn't even bother looking at support and resistance levels, once they start shutting down travel and keeping people indoors here in the US markets will collapse so fast they will probably halt them, probably shut them down, the fed wont be able to stabilize this market this time and with a shift in market psychology money will not be coming into this market anytime soon. People would rather get 1.5% in CDs than risk this market environment going forward. So how far can it drop is anyone's guess, but get ready for wild rides and get ready to sell any skyrocketing rallies because they will not last.