• The win/loss ratio or success is the ratio of the number of winning trades of a trader to the number of losing trades.

  • In other words, the win/loss ratio tells you how many times a trader will have successful profitable trades versus how many times he will lose money on his trades.
  • The win/loss ratio used with the win/total trade ratio can be used in the Kelly Criterion formula to calculate the maximum percentage of a trader’s account that should be risked on any trade.