The $300~ support level has been tested several times in the past few months (since ~september) and such support appears to be very strong. Breaching this level will probably result in further price declines of at least $40-$50 in the near term
I think 300 is pretty strong too, but different EW counts leads to suppose a breach to 275 is also probable.
Here is a chart of mine, using EW (I'm beginner in EW analysis so feel free to criticize and give feedback) :
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check https://www.tradingview.com/v/5KWjIxbQ/ for details and more explanations