Way of the Turtle

"Turtles view the past holistically and don't put any particular emphasis on recent events." Cognitive biases create opportunities.

"Turtles view the past holistically and don't put any particular emphasis on recent events." Cognitive biases create opportunities. Traders can gain an edge by recognizing and exploiting common psychological tendencies in market participants. These include recency bias (overweighting recent events), loss aversion (fearing losses more than equivalent gains), and the disposition effect (holding losing trades too long and selling winners too early). Trend following capitalizes on inefficiencies. The Turtle trading system primarily exploited momentum and the tendency for trends to persist longer than most people expect. By using simple breakout rules and adding to winning positions, Turtles were able to capture large trends across diverse markets. Key biases to exploit: Recency bias Loss aversion Anchoring Herd behavior Turtle edge: Riding trends longer than others expect

"If you don't keep an eye on risk, it will set its eye on you." Position sizing is crucial. The Turtles used a sophisticated volatility-based position sizing system that normalized risk across different markets. This allowed them to take similar-sized bets in terms of risk, regardless of the underlying asset's price or volatility. Diversification enhances returns. By trading a wide range of uncorrelated markets, the Turtles were able to smooth out returns and reduce the impact of drawdowns in any single market. They also had strict rules limiting exposure to related markets and overall directional risk. Turtle position sizing: Based on Average True Range (ATR) Normalized volatility across markets Limited exposure in correlated markets Benefits of diversification: Smoother equity curve Reduced impact of single market drawdowns More opportunities for profit

"Good trading is not about being right, it is about trading right." Consistency is key to long-term success. The Turtles who performed best were those who followed the rules most consistently, even during drawdowns or periods of poor performance. Deviating from the system, even with seemingly good reasons, typically led to worse outcomes. Mechanical systems remove emotion. By following a set of clearly defined rules, traders can avoid many of the psychological pitfalls that lead to poor decision-making. This allows for more consistent execution and the ability to stick with winning trades longer. Benefits of consistency: Captures infrequent but large winning trades Removes emotional decision-making Allows for proper evaluation of system performance Dangers of inconsistency: Missing key trades that drive annual returns Inability to distinguish system flaws from poor execution Emotional reactions leading to larger losses

"The core of our approach was simple: catch every trend." Simplicity leads to robustness. The Turtle trading rules were surprisingly simple, based primarily on breakouts and trend following. This simplicity made the system more robust and less likely to fail when…