Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Question about protecting yourself from company not beating earning eastimate
The best thing to do to avoid this is not to sell as you've described. What purpose does it solve? If you're speculating, set a price at which you want to cash out and put a limit order. If you're a long term investor, then unless something fundamental has changed - why would you sell?