This screener lists stocks that currently match PPO(12,26,9) Crossed Below Zero, one of the Percentage Price Oscillator screens. The Percentage Price Oscillator (PPO) is a technical indicator used in financial markets to measure the difference between two moving averages as a percentage of the larger moving average. 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.