This indicator provides breadth ratios for various indices/exchanges based on the up/down volume.
Breadth ratios included for NYSE, NASDAQ, AMEX, DJIA, ARCA, and and average.
Very straight forward to use, if the ratios is above 2, stocks should be in uptrend, below -2 stocks should trend down. In between 2 and -2 is going to be a choppy market.