Turtle Trading
Turtle Trading is a systematic trend-following strategy that involves buying assets that break above a defined resistance level and selling assets that break below a defined support level, based on a set of strict rules for entry, exit, and risk management.
Tumisang Bogwasi
Tumisang Bogwasi
What is Turtle Trading?
Turtle Trading is a trend-following strategy that emerged from a trading experiment in the mid-1980s. It was developed by Richard Dennis, a successful futures trader, who believed that trading could be taught to anyone, even those with no prior experience. To test his theory, he recruited and trained a group of novice traders, famously known as “turtles,” who were then given a set of rules to follow for trading futures contracts.
The core principle behind Turtle Trading is to capture significant price trends by systematically buying breakouts of resistance levels and selling breakdowns of support levels. The strategy emphasizes strict risk management, position sizing, and adherence to predefined exit rules to limit losses and let profitable trades run. This methodical approach aims to achieve consistent returns by participating in major market movements rather than attempting to predict short-term fluctuations.
The success of the turtles in the experiment lent credibility to Dennis’s belief that trading systems, when rigorously defined and followed, could yield positive results. The strategy’s rules have since been shared and adapted, becoming a foundational concept for many systematic traders and quantitative investors seeking a disciplined way to navigate financial markets.
Definition
Turtle Trading is a systematic trend-following strategy involving buying assets that break above a defined resistance level and selling assets that break below a defined support level, based on a set of strict rules for entry, exit, and risk management.
Key Takeaways
- Turtle Trading is a trend-following strategy developed from a trading experiment.
- It involves systematic buying on resistance breakouts and selling on support breakdowns.
- Strict adherence to predefined rules for entry, exit, and position sizing is crucial.
- The strategy emphasizes capital preservation through defined risk management techniques.
- It aims to capture large market trends rather than short-term price movements.
Understanding Turtle Trading
The essence of Turtle Trading lies in its mechanical and unemotional execution. The original turtle system used two main trading rules: a Donchian Channels breakout system with specific lookback periods (e.g., 20-day and 55-day breakouts). A shorter-term system (20-day breakout) was used for shorter trends, while a longer-term system (55-day breakout) was designed to capture major, sustained trends.
Position sizing was a critical component, calculated to ensure that a single trade, if it went against the trader, would not risk more than a small percentage of the total trading capital (e.g., 1% or 2%). This was achieved by adjusting the size of the trade based on market volatility, typically using Average True Range (ATR) to determine the appropriate number of units to trade.
Exit rules were equally important and equally mechanical. Turtles were instructed to exit a trade if the price moved against them by a certain amount (a stop-loss) or if the price reversed its trend. This disciplined approach prevents emotional decisions and ensures that losses are cut short while allowing profitable trades to accumulate larger gains.
Formula (If Applicable)
While the original Turtle Trading strategy did not rely on a single complex formula, its position sizing and exit rules were mathematically derived. A key component involves the Average True Range (ATR) to determine volatility and set stops.
Position Sizing Calculation Example:
Let:
– $N$ = Average True Range (ATR) over a specified period (e.g., 20 days).
– $U$ = The maximum percentage of trading capital to risk per trade (e.g., 2%).
– $T$ = Total trading capital.
The amount of capital to risk per trade is $T \times U$.
The dollar risk per unit is $N \times \text{points per dollar}$. (For futures, 1 point may be worth a specific dollar amount.)
The number of units to trade ($S$) is calculated as:
$S = \frac{T \times U}{\text{Dollar value per point} \times N}$
For example, if $T = \$1,000,000$, $U = 0.02$ (2%), and the dollar value per point of the asset is $10, and $N = 50$ points, then:
$S = \frac{\$1,000,000 \times 0.02}{\$10 \times 50} = \frac{\$20,000}{\$500} = 40$ units.
The exit stop loss is typically set at $2 \times N$ points away from the entry price.
Real-World Example
Consider a trader employing the Turtle Trading strategy on a stock that has been trading in a range. The strategy dictates using a 20-day Donchian Channel breakout. If the stock price closes above the highest price of the last 20 days, a buy signal is generated.
Upon receiving the buy signal, the trader calculates the position size. They might determine the current Average True Range (ATR) for the stock is $5. If their risk per trade is set at 2% of their $100,000 account and the stock is trading at $100 per share with a volatility multiplier of $100 per point, they would calculate their units to trade. The initial stop-loss order would be placed $2 \times ATR$ (i.e., $10) below the entry price.
If the trade moves favorably, the strategy allows the stop-loss to be moved to a breakeven point or even trail the price. Conversely, if the price falls by $10 from the entry, the stop-loss order is triggered, and the trade is exited, limiting the loss to the predetermined 2% of the portfolio.
Importance in Business or Economics
Turtle Trading is significant in business and economics primarily for its contribution to the field of quantitative trading and algorithmic strategies. It demonstrated that structured, rule-based trading could be taught and executed effectively by individuals without extensive prior experience, democratizing a facet of financial markets.
The strategy’s emphasis on risk management and position sizing is paramount. It highlights how controlling potential losses is as critical as identifying winning trades for long-term profitability. This disciplined approach has influenced the development of sophisticated trading algorithms and risk management frameworks used by institutions today.
Furthermore, Turtle Trading’s success contributed to the growing acceptance of systematic trading approaches. It provided a concrete example of how market inefficiencies could be exploited through mechanical execution, influencing the design of trading systems and the training of traders in hedge funds and proprietary trading firms.
Types or Variations
While the original Turtle Trading strategy is well-defined, several variations and adaptations have emerged over time. These often involve modifications to the lookback periods for breakouts, the type of channels used (e.g., Keltner Channels instead of Donchian Channels), or the methods for calculating position sizing and stop-losses.
Some traders might use shorter or longer lookback periods to adapt to different market conditions or asset classes. Others may incorporate different volatility measures beyond ATR, or adjust the multiplier for setting initial stop-losses. Additionally, variations can include different portfolio construction techniques or rebalancing rules.
Many modern systematic trading strategies can trace their lineage back to the core principles of Turtle Trading, albeit with more complex mathematical models and optimization techniques. These advanced versions often leverage machine learning or AI to refine entry and exit signals.
Related Terms
Trend Following
Donchian Channels
Average True Range (ATR)
Systematic Trading
Algorithmic Trading
Risk Management
Position Sizing
Sources and Further Reading
Quick Reference
Core Concept: Trend following strategy.
Key Tools: Donchian Channels, Average True Range (ATR).
Objective: Capture major market trends.
Method: Buy breakouts, sell breakdowns.
Risk Control: Strict position sizing and stop-losses.
Philosophy: Mechanical, unemotional trading.
Frequently Asked Questions (FAQs)
What was the main goal of the Turtle Trading experiment?
The main goal of the Turtle Trading experiment was to prove that trading could be taught to individuals with no prior experience, using a systematic and rule-based approach developed by Richard Dennis.
Are the original Turtle Trading rules still effective today?
While the core principles of trend following and disciplined risk management remain relevant, the original Turtle Trading rules may require adaptation to current market conditions and increased competition. Many traders use modified versions or incorporate them into more complex strategies.
What is the role of risk management in Turtle Trading?
Risk management is central to Turtle Trading. It involves strict position sizing based on volatility and the use of predefined stop-loss orders to limit potential losses on any single trade, ensuring capital preservation.
