The program enables you to display seven types of volume-based studies: Volume and open interest studies are useful in forecasting price activity. Some general principles for using volume and open interest studies include: Total volume and/or total open interest should be used in a study involving volume and/or open interest. Open interest studies must be adjusted seasonally. Increases in volume and open interest suggest a continuation of a price trend. Decreases in volume and open interest suggest a change in a price trend. see, John J. Murphy, Technical Analysis of the Futures Markets, A Comprehensive Guide to Trading Methods and Applications, New York: New York Institute of Finance, A Prentice-Hall Company, 1986, p. 199. These and other principles for analyzing volume and open interest are available in the source cited below.Volume and Open Interest