Quadrix is a stock rating system that uses over 90 variables in seven major categories to determine the value of a stock. The Quadrix system is produced and maintained by Horizon Publishing Company. The seven major categories are momentum, quality, value, financial strength, earnings estimates, performance, and reversion. The overall score for a particular stock is determined by a weighted average of all 90 variables.The Quadrix system has been praised for its ability to identify stocks that are undervalued by the market. In addition, the system has been shown to be effective in identifying stocks that are about to experience a significant price movement.