- Why is risk control so important? Legendary traders Bill Eckhardt and Rob Sorrentino explain its role in systematic trading and why it should (almost always) take precedence over prediction.
- Most traders fail because of natural bias. To succeed in the market, you’ve got to learn to overcome these basic instincts
- Despite ongoing changes in the marketplace, trend-following is far from dead. But traders should be careful not to rely too much on following the crowd and getting caught up in shiny, distracting strategies with weak foundations.
What do turtles and trading have in common?
The man to answer that question is Bill Eckhardt — a name synonymous with systematic trading. As co-creator of the famous Turtle Trading experiment, Bill has spent decades refining trading strategies that blend rigorous research with a deep understanding of human psychology.
While markets never stop evolving, old traditions — like following trends — remain popular. They have their place, but traders should adopt these strategies with care. After all, human instinct can often be the main cause behind a trader’s downfall in the market.
The key to long-term market survival is risk control
Bill has a surprising take on market success: Traders who stay in the game succeed not because they’re great at predicting markets but because they’re great at managing risk. In fact, his guiding principle is clear: “Put 10 times as much emphasis on risk control as you do on trying to predict where the market’s going.”
For Bill, trying to consistently predict market movements is close to impossible. “You almost never know better than about 51 or 52% which way the market’s going,” he explains. Instead, he advocates focusing on what you can control: your risk exposure. This approach — which is deeply embedded in Eckhardt Trading Company’s (ETC) strategies — is grounded in utility theory.
Using this rigorous mathematical framework, traders optimize their decision-making under uncertainty. Utility theory is no abstract concept. It’s a practical tool that unsure traders can lean on. “You can’t predict where the market’s going,” Bill says. “You have to know what you’re going to do when the market goes anywhere.”
Overcoming human nature: Why most traders fail
Human psychology is often a trader’s worst enemy. Bill explains that the natural human inclination is to seek comfort, which can lead to poor trading decisions.Opt for “normal human reflexes [and] reactions, and you'll be losing,” Bill highlights. Successful traders aren’t superhuman. They just resist the urge to follow their instincts.
“Trading, by nature, doesn’t feel good,” Bill explains. “If you’re enjoying it too much, you’re likely doing something wrong.” The key to success is emotional discipline and resisting the human impulse to chase profits or hold onto losing trades for too long after it’s time to let go. It’s called loss aversion.
Letting profits run and cutting losses early is a central mantra for systematic traders, and accounts for much of ETC’s success.
From turtle trades to the modern era
From where did ETC originally emanate? Richard Dennis — once dubbed the “Prince of the Pit” — worked alongside Bill in the 1980s to come up with the Turtle Trading experiment, which sought to answer whether trading could be taught.
While the experiment was wildly successful, those days are long gone. The market’s changed, and so too has ETC’s trading approach.
“The Turtle systems were largely disclosed,” Bill says — referencing an original Turtle leak of its proprietary trading manual. Bill wasted no time in strategizing for the future: “Even while the Turtles were still in operation, I was already developing systems as different from the Turtle systems as I could make them.”
Following the “betrayal”, Bill quickly moved beyond the simple trend-following breakout techniques of the Turtle program, adopting more sophisticated risk management and research-driven strategies.
Trend-following is still alive and well, as expected. But staying ahead in the market means nonstop innovation and adaptation to endlessly shifting realities.
Why trend-following isn’t dead (with a caveat)
Despite increasing competition and changes in the marketplace, Bill remains confident in the longevity of trend-following. While some have proclaimed its death over the years, he believes it still holds a significant place in systematic trading.
“Trend following isn’t dead,” Bill asserts. The key is continuous research and adaptation. As markets evolve, traders need to innovate to stay ahead, but the fundamental principles of trend following — like identifying long-term trends and controlling risk — remain as relevant as ever.
Bill’s advice for modern traders? “Run as fast as you can just to stay where you are.” Constant improvement is what maintains an edge in today’s cutthroat environment.
Beware replication
Be mindful of trends, and even follow them if you must, but be wary of overusing replication techniques — especially those relying on historical market data to mirror the performance of broad indices like the SG CTA INDEX. While they might sound appealing, they often overlook critical risk factors, particularly the emotional and discretionary aspects of trading.
“Replication can give you a fitting portfolio based on the past, but it’s almost an invitation to overfit,” he says. This is especially dangerous because futures markets are notoriously non-normal and subject to unpredictable tail events, which traditional statistical techniques don’t account for.
Replication strategies often fail to effectively manage risk effectively — kryptonite for traders — in the face of high volatility periods or sharp market reversals. Bill advocates for a more robust, research-driven approach that adapts to changing market conditions and emphasizes risk management over blind replication.
Prioritize research, but avoid overfitting and underfitting
Research is at the core of ETC’s trading strategy. “We’re a research lab first and foremost,” Bill says, noting that this focus on research allows ETC to constantly improve its systems and stay ahead of market changes.
One of the major challenges ETC faces is balancing overfitting and underfitting. Overfitting occurs when a model is too closely tailored to historical data, making it less effective in real-time markets. ETC’s in-house techniques for controlling overfitting are unique. “We’ve really decreased the extent to which we’ve overfit,” Bill says, emphasizing that finding the right balance between using enough data without over-relying on past patterns is crucial.
However, underfitting — where a model doesn’t extrapolate enough useful data from datasets — is just as dangerous. To avoid it, ETC runs its models across multiple market environments and timeframes. Using decades of historical data, ETC ensures it’s versatile enough to recognize longer-term patterns that might otherwise go unnoticed. “We make sure we’re capturing all the relevant information markets provide,” Rob says.
Leverage volatility for better trading signals
Pay attention to volatility: It’s a key input in trading signals. ETC integrates volatility into multiple facets of their trading systems — using it to size trades, measure price changes and (of course) manage risk.
Volatility is both an opportunity and a risk. “Increased volatility often helps us, and we don't want to restrain that,” Rob adds. The goal is to harness it to improve the effectiveness of trading systems while mitigating the downside risks it can bring through overreliance on volatility metrics.
“We don't target portfolio volatility,” Bill says. However by incorporating volatility into multiple aspects of their strategy, ETC is able to capitalize on market fluctuations while staying mindful of the increased risk they bring.
In this way, ETC leverages volatility as both a signal for opportunity and a key tool in risk management — ensuring it remains adaptable across varying market environments.
Diversify, forever
If effective volatility and risk control are critical for market success, diversification is a natural bedfellow.
“Diversification was the greatest financial idea of the 20th century,” Bill states. Spreading risk across multiple markets gives traders as much reassurance as they could hope for amid any chaos. ETC trades around 70 markets, providing a broad base of diversification.
But beware: Not all markets are suitable for trading. “Alternative markets” can appear more profitable on paper but suffer from liquidity issues and high trade slippage — eroding profits in practice. “Alternative markets might appear better, but in practice, they’re actually worse,” Bill cautions.
Is short-term trading a risky business?
While ETC is best known for its long-term systematic strategy, short-term trading also plays a vital role in managing risk. “We try to cover the short, medium, and long-term perspectives,” Bill explains, emphasizing that their approach isn’t limited to any one time frame.
With flexibility critical to the company’s overall risk control philosophy, Bill notes that “Our systems are designed to be dynamic — responding to market changes across different time horizons.” As such, ETC manages to effectively navigate volatile periods.
“The shorter-term systems allow us to get in and out of trades quicker, especially when there’s an unexpected market shift,” Bill points out, underscoring how these systems help ETC limit drawdowns and manage volatility.
Although the business focuses primarily on longer-term trends, this short-term strategy provides an extra layer of protection allowing the firm to react swiftly to market changes. A combination of diverse timeframes gives ETC its balanced portfolio — reducing over-exposure to any single market condition.
The Gauntlet: Stress-testing trading systems
If you’ve got a trading strategy you think is the one to rule them all, consider running it through ETC’s rigorous stress-testing process: the Gauntlet.
“We’ve had people call us just to have their systems run through the Gauntlet,” Rob says. “It’s an intensive barrage of tests to tear apart a system and see where it might fail.”
The Gauntlet doesn’t just test the systems themselves, but also evaluates the software running those systems: “It can find very subtle glitches in the program that otherwise would be nearly impossible to find,” Bill says. This level of detail means that any system that runs the Gauntlet successfully should be robust enough to withstand different market environments.
What’s more is that the Gauntlet helps eliminate emotional bias from trading decisions. As Rob explains, “Bill has taught us to be as scientific as possible and eliminate the emotion from decision-making.”
By rigorously evaluating each system and eliminating the potential for overfitting or underfitting, ETC ensures that only the most resilient strategies make it to live trading, safeguarding client capital and long-term performance.
Keep your eyes on the prize — and the danger — to stay ahead
ETC leadership offers a clear roadmap for navigating the complexities of modern trading. From emphasizing risk control over market prediction to recognizing the critical role of research and innovation in systematic trading.
“The structure of the market is that the money flows from the many to the few,” Bill says. “So you have to be among the few, not among the many.” By focusing on risk, overcoming human instinct, and continuously improving trading systems, investors can easily position themselves as the chosen few who rise above the lagging many.
This is based on an episode of Top Traders Unplugged, a bi-weekly podcast with the most interesting and experienced investors, economists, traders and thought leaders in the world. Sign up to our Newsletter or Subscribe on your preferred podcast platform so that you don’t miss out on future episodes.