What Should I Put in my Trading Journal?

You should put trade details (date, instrument, entry, exit, size, P&L), your setup and thesis, a screenshot of the chart, your emotional state, and a post-trade grade in your trading journal. The quantitative data shows what happened while the qualitative notes explain why, and you need both to run a meaningful review. Grade each trade on process, not outcome — a losing trade with perfect execution deserves an A, and a winning trade born from impulse deserves an F.