Ancient navigators used dead reckoning to estimate their position by tracking speed, direction, and time from a known starting point. They did not rely on landmarks. They relied on honest accounting of where they had been. In trading, dead reckoning is your journal, your metrics, and the brutal truth about whether you actually have an edge.
Most traders think they are better than they are. They remember winners vividly and forget losers quickly. They attribute wins to skill and losses to bad luck. This self-deception is fatal. Dead reckoning is the antidote. It forces you to confront the numbers as they are, not as you wish them to be.
The Trading Journal: Your Logbook
Every captain keeps a logbook. Every trader should keep a journal. Not a diary of feelings — a structured record of decisions, outcomes, and the reasoning behind them.
What to Record for Every Trade
| Field | Why It Matters |
|---|---|
| Date / Time | Identifies session patterns and seasonal biases |
| Symbol / Direction | Basic identification |
| Entry Price / Size | Exact execution record |
| Stop Price | Pre-defined risk; did you honor it? |
| Target Price | Pre-defined reward; did you hit it? |
| Setup / Strategy | Which playbook was this? Trend, mean reversion, breakout? |
| Thesis | Why did you take this trade? Be specific. |
| Exit Price / Reason | How and why did you exit? Stop, target, discretion? |
| P&L ($ and %) | The outcome |
| Emotional State | Calm, anxious, euphoric, revenge-seeking? |
| Market Context | Trending, ranging, high/low volatility? |
| Post-Trade Notes | What did you learn? What would you do differently? |
This level of detail seems excessive. It is not. After 50 trades, patterns will emerge that no amount of intuition can detect. You will discover that your breakout trades lose money while your pullback trades print. That you trade terribly on Mondays. That your position sizes are too large when you are anxious. The journal reveals what your memory conceals.
Performance Metrics: The Honest Math
Your brokerage statement tells you your total return. It does not tell you why you achieved it. These metrics separate luck from skill:
Win Rate
Win rate alone is meaningless. A 90% win rate with tiny wins and massive losses is a disaster. A 30% win rate with huge wins and small losses can be highly profitable. Win rate must be evaluated alongside risk/reward.
Profit Factor
Profit factor above 1.5 is solid. Above 2.0 is excellent. Below 1.0 means you are losing money overall regardless of win rate. This is the single most important metric for evaluating a strategy's viability.
Expectancy
Expectancy tells you the average amount you can expect to make (or lose) per dollar risked. Positive expectancy means your strategy has an edge. Negative expectancy means you are gambling. A good target is $0.50+ per dollar risked.
Maximum Drawdown
The largest peak-to-trough decline in your equity curve. Not the number itself that matters, but how you behaved during it. Did you stick to your plan? Did you increase risk to recover? Did you stop trading entirely? The drawdown reveals your true character.
Sharpe Ratio
Sharpe ratio measures return per unit of risk. Above 1.0 is good. Above 2.0 is exceptional. Below 0.5 suggests you are taking too much risk for the return. Be cautious: Sharpe can be manipulated by strategies with hidden tail risk.
Attribution Analysis: Where Does Your Edge Live?
Attribution breaks down your returns by source. It answers: What am I actually good at?
Segment your trades by:
- Strategy type: Breakouts, pullbacks, mean reversion, momentum
- Timeframe: Day trades, swings, position trades
- Market condition: Trending up, trending down, ranging, volatile
- Sector / asset class: Tech, energy, forex, commodities
- Day of week / time of day: When do you perform best?
- Position size: Do you perform better with smaller or larger positions?
Attribution Example
After 100 trades, you discover:
- Breakout trades: −$3,200 (unprofitable)
- Pullback trades: +$8,400 (profitable)
- Trending markets: +$6,100
- Ranging markets: −$900
- Morning trades: +$4,200
- Afternoon trades: +$1,100
The conclusion is obvious: stop trading breakouts. Focus on pullbacks in trending markets, preferably in the morning. This is not theory. This is your data speaking.
The Review Ritual
Data without review is just noise. Establish a regular review ritual:
- Daily: 5-minute review of the day's trades. Note emotional state and any deviations from plan.
- Weekly: 30-minute review of the week's metrics. Are you on track? Any patterns emerging?
- Monthly: 2-hour deep dive. Full attribution analysis. Strategy adjustments. Goal setting for next month.
- Quarterly: 4-hour strategic review. Is your edge still valid? Has the market regime changed? Do you need to adapt or persevere?
The Honest Conversation
Dead reckoning culminates in a conversation with yourself. It is uncomfortable. It requires admitting that you are not as good as you thought. That your favorite strategy does not work. That you trade for entertainment, not profit. That you should stop.
But it also reveals your strengths. The strategy that consistently prints. The market condition where you thrive. The position size that optimizes your performance. The time of day when you are sharpest. These insights are worth more than any single trade.
The captain who does not know his own position is lost, no matter how good his charts. The trader who does not know his own edge is gambling, no matter how sophisticated his strategy.
Fair winds.