9 Trading Journal Metrics That Actually Improve Your P&L

Your trading journal can spit out a hundred numbers. Most are noise. A handful genuinely change decisions. This is the shortlist — the metrics worth reviewing every week, what each one tells you, and the trap to avoid with each.

1. Expectancy (the one number that matters most)

Expectancy is your average profit or loss per trade, across everything. It answers the only question that matters long term: does this system make money when repeated?

Expectancy = (Win% × Average Win) − (Loss% × Average Loss)

A positive expectancy with enough trades is a green light to size up. A negative one means no amount of position sizing will save you — you're compounding a losing edge. Check expectancy per setup, not just overall, and you'll quickly see which strategies deserve your capital.

Trap: a great expectancy over 12 trades is luck, not edge. Wait for sample size.

2. Win rate — but only by setup

Overall win rate is close to a vanity stat. A 40% win rate can be wildly profitable and an 80% win rate can bankrupt you — it depends entirely on your reward-to-risk. Win rate only becomes useful when you break it down by setup, because then you can see which patterns you actually read well.

Trap: chasing a higher win rate by cutting winners early. That raises the stat and lowers the account.

3. Average R-multiple

R-multiple expresses each trade's result in units of the risk you took. Risk $100, make $300 → that's +3R. Risk $100, lose $100 → −1R. Thinking in R frees you from dollar amounts and lets you compare a tiny position to a large one on equal footing.

Your average R per trade is expectancy in its cleanest form. Above +0.2R across a real sample is a solid, scalable edge.

4. Reward-to-risk ratio (planned vs. realized)

Log your planned R:R at entry and compare it to what you actually realized. The gap is one of the most revealing numbers in your journal. If you plan 3:1 but realize 1.2:1, you're cutting winners early or letting losers run — a discipline leak that no setup change will fix.

5. P&L by day of week and hour

Almost every trader has a graveyard hour — a window where they consistently give back profits. Boredom trades after lunch, revenge trades at the open, overtrading on Fridays. Slice your P&L by hour and by weekday and the pattern is usually embarrassingly clear. Then just… stop trading that window.

This one metric has the highest ratio of "easy to fix" to "impact" of anything on this list.

6. Maximum drawdown

Drawdown is the largest peak-to-trough drop in your equity. It matters for two reasons: it sizes the emotional pain you need to survive, and it sets realistic position sizing. If your system has a −20% drawdown historically, sizing that risks ruin at −15% is a recipe for blowing up right before the recovery.

Trap: ignoring drawdown because you're currently up. Plan for the drawdown you haven't had yet.

7. Plan adherence

Track the percentage of trades where you followed your written plan — entry, stop, target, and thesis. This is the single best predictor of long-term survival, and it's completely within your control. High adherence with negative expectancy means fix the system. Low adherence means fix you first; the system can't be evaluated until you're actually running it.

8. Average hold time (winners vs. losers)

Compute average hold time separately for winners and losers. A classic, account-draining pattern: losers held longer than winners. It means you're cutting profits fast (fear) and nursing losses slow (hope). Seeing the two numbers side by side is often the wake-up call that fixes it.

9. Streaks

Your longest win and loss streaks tell you about variance and about tilt. Long loss streaks are normal even in profitable systems — knowing yours in advance keeps you from abandoning a good strategy during an expected rough patch. And if your P&L craters right after a loss streak, that's tilt, not the market.

Turn metrics into changes

Numbers only matter if they change behavior. The routine:

1. Review these weekly, not daily (daily is noise).
2. Find the one metric screaming the loudest.
3. Make one change. Re-check next week.

That's the whole loop — measure, isolate one leak, fix it, repeat.

Sutekka computes all nine of these automatically from your imported trades — expectancy and R-multiple by setup, drawdown, plan adherence, and time-of-day heatmaps — so your weekly review is reading a dashboard, not building a spreadsheet. Start free and see your numbers this week.