Back to Library

Diary of a Professional Commodity Trader: Lessons from 21 Weeks of Real Trading

by Peter L. Brandt (2011)

Quick summary -- an in-depth PhD-level extended summary (10-30 pages) for this book is coming soon.

Diary of a Professional Commodity Trader: Lessons from 21 Weeks of Real Trading

By Peter L. Brandt

Quick Summary

A real-time trading diary documenting 21 weeks of actual commodity futures trading by veteran trader Peter Brandt. The book provides unfiltered transparency into the decision-making process, trade selection, risk management, and emotional challenges of professional commodity trading, covering both winning and losing trades with complete honesty about the reality of professional speculation.

Executive Summary

"Diary of a Professional Commodity Trader" provides a rare window into the day-to-day reality of professional commodity trading. Peter Brandt, a trader with over 30 years of experience in commodity futures, documented his trading in real time over a 21-week period, recording every trade, every decision, and every emotional response. The book covers his classical chart pattern approach to trade identification, his risk management methodology (including position sizing based on chart pattern targets and stop levels), and the psychological challenges that even experienced professionals face. Unlike most trading books that present polished retrospective analysis, this diary format captures the uncertainty, doubt, and imperfection inherent in real trading. Brandt is candid about his losing streaks, his mistakes, and the emotional discipline required to follow his system consistently.

Key Principles

  1. Classical Chart Patterns -- Brandt trades primarily based on classical charting patterns (rectangles, triangles, head and shoulders, etc.)
  2. Risk-Based Position Sizing -- Position size determined by the distance from entry to stop-loss
  3. Trade Journaling -- The diary itself demonstrates the value of recording every trade decision
  4. Emotional Transparency -- Honest documentation of the psychological challenges of live trading
  5. Process Over Outcome -- Focus on executing the method properly rather than on individual trade results

Critical Assessment

Strengths

  • Unmatched transparency into real-time professional trading
  • Covers both winners and losers without cherry-picking
  • Demonstrates that even professionals experience doubt, frustration, and losing streaks
  • The diary format is instructive for developing one's own trade journal practice

Limitations

  • The PDF text extraction is problematic, suggesting a non-standard encoding
  • 21 weeks may not represent a statistically significant sample
  • The approach is specific to classical chart patterns in commodity futures
  • Results from any specific period may not be representative of long-term performance

Conclusion

Brandt's diary is valuable precisely because of its raw honesty. It demonstrates that professional trading is not a steady stream of profits but a messy, uncertain process requiring constant discipline and emotional management.