The tutorial explains how to effectively utilize the Historical TOI feature to analyze the open interest data of past expiries. Reddy and Phatak demonstrate how this can help in understanding market sentiment, identifying potential support and resistance levels, and recognizing patterns in option writers' behavior leading up to expiry. They provide practical examples and insights into interpreting the data to anticipate market movements and formulate trading strategies. This session is an invaluable resource for options traders looking to deepen their analytical skills and gain a competitive edge in the market.