: This book introduced not only the RSI but also other legendary indicators like the Average True Range (ATR), Parabolic SAR, and the Directional Movement Index (ADX).
For those seeking more modern applications or specific "done-for-you" strategies in PDF format, several comprehensive guides are highly regarded in the trading community: rsi pdf book
If you are looking for the original source, the most important "RSI book" is by J. Welles Wilder Jr. (1978). : This book introduced not only the RSI
: J. Welles Wilder Jr., the inventor of the Relative Strength Index (RSI). rsi pdf book