Amarin Corp Plc (AMRN)

[ferretmoney]

Since the puts are a $15 strike and the premium is $3 you could set a stop at $12 for the same amount of protection without expiration. However, a trailing stop is probably a better idea if you want that protection. There is one caution of course. If there is a catastrophic break down of the price a stop loss will do no good where a put will guarantee a bottom.