Volume, the number of contracts traded during a trading session, and open interest, the total of all unclosed positions at the end of a trading session, have been used as technical indicators of market trends for over 140 years! Yet this is the first book, ever, devoted solely to these critical indicators. Written by Ken Shalen, internationlly known futures trader, educator and market advisor, 'Volume and Open Interest' is the definitive source for understanding how market sentiment is reflected through volume and opn interest indicators. Readers wll develop a disciplined approach to using volume and open interest by identifying discrepencies in market behavior.