Dow theory on stock price is a form of technical analysis that is used to forecast the trend of the stock (Bullish or Bearish). The theory was written by Charles H. Dow.we need to take the data of approx 2 years and plot it into line chart then we should mark the tops and bottoms. Qualify the tops and bottoms Look for a sequence to find the trend.If the sequence is formed with Higher bottom and Higher Top with significant volume it is a Bullish trend. If the sequence is formed with Lower bottom and Lower Top with significant volume it is a Bearish trend