1. If price drops 10%, just hold
2. If price drops 20%, add 10%
3. If price drops 30%, add 30%
4. If price drops 40%, add 30%
5. If price drops 50%, add 50%
6. If price goes up 10%, just hold
7. If price goes up 20%, still hold
8. If price goes up 30%, sell 10%
9. If price goes up 40%, sell 20%
10. If price goes up 50%, sell 30%
11. If price goes up 60%, sell 40%
12. If price goes up 100%, sell all
