When I am really at the bottom, I am afraid that I will never reach the bottom;
When it was really at the top, I was afraid of selling a fly ball;

So I used to basically buy a little bit above the bottom;
Or most will sell for a little less than the top;

No matter why, just be willing to spend time consolidating your thinking and avoiding risks.

The first lesson of leeks is to keep your principal and profits before you want to eat a fat man in one go.
In the ecological niche, you must know your position.