This is an idea, not financial advice.
In the money Puts for March 18, 19 strike price. Stop price 18.50, targeting ~$16.25.
https://www.tradingview.com/x/LM8SDZ8n/
If you wish to play it more conservatively, enter the trade when the 20ma trends down and use it as your stop.
THIS STOCK REPORTS ITS EARNINGS ON 1/24/18