Implement mean-reversion method (Back tested is preferred).

**Details**
1. Historical OHLC data (Yfinance preferred).
2. Use bollinger bands, Z-Scores 
3.  Ornstein-Uhlenbeck model for mean reversion detection
4. Also, include sharpe ratio, max drawdown


**Additional Notes**
- Open to both simple and advanced bollinger bands
- This is not any pro deck trading strategy. So, minor mistakes are embraced  but make sure to keep it clear
