With the introduction of personal computers, the science of “technical analysis” of market behavior became broadly available for the first time. At first, its primary appeal was with commodity traders in Chicago and at the stock exchange in New York.
During the past decade, the science migrated into the world of longer-term investing. It turns out that some of the techniques used effectively by commodity traders and day traders also work well when applied to longer-term market trend analysis and stock market investing. And new approaches have developed that apply strictly to longer-term investing.