Original sentence: Behavioral economics and quantitative analysis incorporate technical analysis, which being an aspect of active management stands in contradiction to much of modern portfolio theory.Technical analysis is a financial term used to denote a security analysis discipline for forecasting the direction of prices through the study of past market data, primarily price and volume.The efficacy of technical analysis is disputed by efficient-market hypothesis since stock market prices are essentially unpredictable
Edited sentence: According to the weak-form efficient-market hypothesis, such forecasting methods are valueless, since prices follow a random walk or are otherwise essentially unpredictable.Behavioral economics and quantitative analysis incorporate substantial aspects of technical analysis, which being an aspect of active management stands in contradiction to much of modern portfolio theory.In finance, technical analysis is a security analysis discipline for forecasting the direction of prices through the study of past market data, primarily price and volume