A basic accumulation and distribution model:

1. -5% → Hold

2. -15% → Buy 10%

3. -25% → Buy 25%

4. +5% → Hold

5. +15% → Hold

6. +25% → Sell 10%

7. +35% → Sell 20%

8. +45% → Sell 30%

9. +60% → Sell 40%

10. +100% → Sell 50%

Simple structure. Long-term edge.