ARTICLE SYNOPSIS ...Finding patterns in random data by Nelson Weiderman, Ph.D. Since the advent of the personal computer, a great deal of time has been devoted to finding tradeable patterns in stock and commodity data. The idea is that patterns found in historical data are likely to repeat themselves, indicating opportunities for successful trading (see ""Trading close-to-close patterns"" in this issue). Unfortunately, not much attention has been given to the statistical significance of historical patterns and whether they are different from patterns observed in random data. The purpose of this article is to po...