Dow Theory Concept by which the Analysis of the Stock Market Started, Dow theory is a way of measuring & analyzing the long term data. The Primary Trend, Secondary Trend and Intermediate trend used to analyse the Stock of particular company using Chart. The Trend analysis will not include the Pricing Pattern which accurately measures the stock which is a drawback of Dow Theory. Supply and Demand and Resistance which support the Trendiness of Dow theory helps to understand on Long Primary Trend method.