This document discusses sentiment analysis in trading. It explains how to gather sentiment data from sources like social media, news articles, and open interest data. Sentiment indicators provide insights into crowd psychology and expectations that can be useful for determining high probability trade setups or knowing when retail traders are highly positioned in a certain direction. Sentiment analysis is helpful for finding opportunities to trade against the prevailing retail sentiment. The document provides numerous charts and examples to illustrate how sentiment data can be interpreted and applied to trading.