[ImgBot] Optimize images

*Total -- 8,875.72kb -> 6,664.20kb (24.92%)

/Term 1/1. Stock Prices/images/17. Shorting.png -- 212.70kb -> 142.02kb (33.23%)
/Term 1/1. Stock Prices/images/3. OHLC Chart.png -- 226.18kb -> 152.58kb (32.54%)
/Term 1/1. Stock Prices/images/17. Long Positions.png -- 256.08kb -> 176.04kb (31.25%)
/Term 1/1. Stock Prices/images/4. OHLC - Volume.png -- 245.72kb -> 170.74kb (30.52%)
/Term 1/1. Stock Prices/images/2. OHLC.png -- 239.19kb -> 169.34kb (29.2%)
/Term 1/1. Stock Prices/images/16. Log Returns.png -- 49.22kb -> 34.98kb (28.93%)
/Term 1/1. Stock Prices/images/5. Intraday Volume.png -- 290.58kb -> 209.12kb (28.03%)
/Term 1/1. Stock Prices/images/18. Cross sectional trading.png -- 707.10kb -> 512.29kb (27.55%)
/Term 1/1. Stock Prices/images/21. p value.png -- 367.91kb -> 273.91kb (25.55%)
/Term 1/1. Stock Prices/images/13. outliers.png -- 581.15kb -> 432.93kb (25.5%)
/Term 1/1. Stock Prices/images/12. Bollinger bands.png -- 587.70kb -> 442.19kb (24.76%)
/Term 1/1. Stock Prices/images/9. Rolling mean.png -- 425.24kb -> 321.12kb (24.49%)
/Term 1/1. Stock Prices/images/11. Buy sell - 1.png -- 516.55kb -> 391.11kb (24.28%)
/Term 1/1. Stock Prices/images/10. Rolling mean points.png -- 465.69kb -> 355.43kb (23.68%)
/Term 1/1. Stock Prices/images/14. Buy sell - 2.png -- 718.25kb -> 550.42kb (23.37%)
/Term 1/1. Stock Prices/images/22. alpha.png -- 445.45kb -> 342.32kb (23.15%)
/Term 1/1. Stock Prices/images/8. Adjusted Prices.png -- 259.55kb -> 200.21kb (22.86%)
/Term 1/1. Stock Prices/images/15. Stock Return.png -- 228.81kb -> 177.51kb (22.42%)
/Term 1/1. Stock Prices/images/1. tick_data.png -- 523.44kb -> 406.23kb (22.39%)
/Term 1/1. Stock Prices/images/7. Stock drops.png -- 214.93kb -> 166.96kb (22.32%)
/Term 1/1. Stock Prices/images/20. t-test.png -- 351.89kb -> 274.05kb (22.12%)
/Term 1/1. Stock Prices/images/19. Trading Strategy.png -- 790.87kb -> 626.59kb (20.77%)
/Term 1/1. Stock Prices/images/6. Stock Split.png -- 171.54kb -> 136.10kb (20.66%)

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