Statistics  |  JAN 2002

Price Persistency by Gordon Gustafson

Price Persistency by Gordon Gustafson Interested in measuring a short-term trend? Here’s an indicator you can use. For years, academics have made the case that price movement is random: future price changes are unrelated to past price changes. Although they are random, runs occur in any series of data. Knowing something about these runs can add valuable information to any trading program. WHAT IS IT? Price persistency is the number of days that a market continues to close either up or down. It’s another term for a market run. As an indicator, price persistency is a measure of a very short-term trend based only on the history of the market’s movement, unfiltered by any complex calculation; all it involves is counting.

by Gordon Gustafson