How to Backtest Yourself
All screens were created and backtested using StockScreen123, an outstanding service if you are serious about creating strategies and testing ideas.
Quick Screen Summary
Earning a Piotroski Score of 9 places a company onto this screener.
The Piotroski scoring system is a nine point system to determine the strength of a firm's financial position.
The higher the score, the better the company is from a financial standpoint.
Read more: Piotroski score screener backtest