This screener lists stocks that currently match VR(21) Crossed Below 3, 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.