This e-book contains the following 1.Disclaimer 2.About the Author 3.What are Stock Options 4.How do Stock Options Work? 5.What are ITM,ATM & OTM 6.How changes in open interest occur? 7.Misconception about open interest 8.Why sellers are more important? 9.Use of Open Interest data 10.How to identify Support & Resistance Levels 11.Long Build up in Option Chain 12.Short Covering in Option Chain 13.Short Build up in Option Chain 14.Long liquidation in Option Chain 15.Market direction based on Option OI 16.Analysis of CE OI 17.Analysis of PE OI 18.Breakout/Reversal Identification in Option Chain 19.What is Put Call Ratio(PCR) 20.Conclusion