F-score is a scoring system to identify companies that show financial strength based on historical data. 9 parameters of the company are evaluated and if they meet certain criteria, a score of 1 is awarded. Else it is given a score of 0.
It is an easy method to separate Winners from losers. If the company financials are strong, good returns can be expected. If they are good, proceed with caution and use other valuation methods for decision-making. If they are weak, it can be considered a red flag.