This screener lists stocks that currently match VR(21) Trending Down Last 13 Days, one of the Volume Ratio screens. The Volume Ratio indicator measures the relationship between buying and selling volume in a market over a specified period. It is calculated by dividing the buying volume by the selling volume(Volume Ratio = Positive volume / Negative volume). The list is updated daily: open a chart for any ticker, or customize the screen, set an alert and backtest it as a trading strategy.