You cannot improve what you do not measure. A rigorous trading journal is what exposes execution flaws and guides real strategic optimization.
1. Key metrics every trader should log
Profit factor, gross profit divided by gross loss, is a core one to track, with an institutional target above 2.0. Win/loss ratio, the percentage of profitable trades against losing ones, matters alongside average realized risk-reward, the actual R:R achieved across executed trades rather than the planned one. Session performance is also worth separating out, tracking P&L across Asian, London, and New York sessions individually rather than lumped together.