1. If you're long already, she won't go up as much as you like.
2. If you're not long yet, but want to go long, she won't drop as much as you like.
3. If you're not short yet, she won't bounce enough to make you want to start your short.
4. If you're already short, you're F*#%ed.
I have less than an hour to trade today, and I'm not long already but would like to buy calls, so AMZN won't drop as much as I'd like her to.