Home / Risk Management / The 5 Money Management And Position Sizing Secrets Of The Turtle Traders

The 5 Money Management And Position Sizing Secrets Of The Turtle Traders

The Turtle traders were a legendary group of traders coached by two successful traders, Richard Dennis and William Eckhardt. They selected 10 people (turtles) with little to no prior trading experience and turned them into winning traders by providing them with a set of very precise trading rules.

The building block of the turtle traders’ success was their advanced risk and money management and their position sizing approach. The following 5 principles explain the most important risk and management principles of the turtle traders’ strategy.


  1. Volatility based stop loss orders of the turtle traders

The turtle traders used a volatility based stop loss order, which means that they determined the size of their stop loss based on the average ATR indicator (Average True Range). This also means that for every trade, they used a different stop loss size to react to changing market conditions.

The charts below show why this stop method is so powerful. Both charts show a breakout scenario with very different price dynamics. Whereas the left chart has very small candlesticks and a low ATR (low volatility), the right chart shows larger candlesticks and a higher ATR value (high volatility). How much sense would it really make to use the same stop loss technique on both breakout trades? Correct, it wouldn’t make any sense. A trader should use a small stop loss for the trade on the left chart and a wider stop loss on the right chart to maximize his reward:risk ratio and to minimize the chances of getting stopped out during insignificant retracements.


Low volatility results in closer stops (click to enlarge)
High volatility results in wider stop (click to enlarge)


Setting a stop further away in times of higher volatility and closer when volatility is low, allows the trader to react to changing market conditions and optimize his reward:risk ratio and risk profile.


  1. A maximum position of 2%

Although the stop loss size (in point distance) changed for every trade, the risked always stayed the same. The maximum allowed risk (position size) on any one trade was 2% of the current total account balance. The table below shows two examples of how the turtle traders would adjust their stop and position size based on volatility.

Volatility Entry Price Stop Loss Price Stop Distance Account Size Risk per trade Contracts to buy
LOW $ 100 $ 96 $ 4 $ 100,000 2% ($ 2,000) 500
HIGH $ 100 $ 90 $ 10 $ 100,000 2% ($2,000) 200

The numbers are for illustration purposes only


Although the risk is identical (2% or $ 2,000), the turtle traders have to buy more contracts during lower volatility because the stop loss is set closer.


Always determine the stop loss distance first. Most amateur traders start by evaluating how many contracts they want to buy and then set their stop loss order so they can achieve a random risk goal. Never start by thinking how many contracts you want to buy/sell before you know your stop loss.


  1. Correlations and risk

If the turtle traders want to enter two trades in different instruments, they had to look at the correlation between the two markets first.

A quick reminder: correlations describe how “similar” two markets move. A positive correlation means that the two markets move in the same direction and a negative correlation means that they move in opposite directions.

Further reading: How to use correlations in your trading


High positive correlation. Two markets move together (click to enlarge)
Negative correlation. Two markets move in opposite directions (click to enlarge)


The two charts above show two different scenarios. On the left, you see two price charts with a very high positive correlation (the two graphs almost move identical). On the right, you see two charts with a negative correlation (they move in opposite directions).

A trader who enters two trades in the same direction (two buy or two sell trades) on positively correlated markets increases his risk because it is more likely that the two trades end up the same. A trader who enters two trades in different directions (one buy and one sell trade)in positively correlated instruments will probably (not guaranteed) not have the same result.


(click to enlarge)


When trading positively correlated markets, your risk increases. When trading negatively correlated markets, you can lower your risk.

The turtle traders did not come up with this strategy, but it has been used by professionals as long as trading exists. It is the irrefutable law of how financial markets work and understanding correlations is of great importance.


  1. Adding to a winner

The turtle traders usually did not enter the full position size on the first entry. Remember that they were allowed to use 2% per trade, but they usually split their order across multiple entries and added to a winner. Their first position would be 0.5% and after the trade has moved into profits, they would add another 0.5%. They would keep adding to their trade until they reached the maximum of 2%. At the same time, they moved their stop loss behind price to protect their position.

The advantages of adding to a winning trade:

  1. You limit your losses. The turtle traders’ strategy was a breakout and trend-following strategy. On a false breakout, when price immediately reversed on them, they would usually only have a very small position and not yet have scaled in. Thus, the loss they take is only a small portion of the 2% maximum risk.
  2. You can catch large winning trades and protect your position. You would only reach your full position size during high momentum breakouts and once you had reached the maximum exposure of 2%, the initial stop loss orders would already have locked in some profits.
You have to minimize your losses and try to preserve capital for those very few instances where you can make a lot in a very short period of time. What you can’t afford to do is throw away your capital on suboptimal trades. – Richard Dennis


  1. Adjusting position size during losing streaks

Dennis and Eckhardt understood that the most important thing during a losing streak is not how fast you can recoup your losses, but the degree to which you can limit your losses. Their rule to limit drawdowns during losing streaks shows this principle:

If your account drops 10%, you then trade as if your account has lost 20%. If you lost $10,000 on a $100,000 account, you then trade as if your account only has left $80,0000.

This means that even though your account is now $90,000 and your 2% would be $1,800, you only trade as if your account is $80,000 with a maximum risk of $1,600. This strategy will greatly reduce the losses once a trader enters a significant losing streak and it takes away a lot of emotional pressure as well.


This sounds like a lot of rules for just money management and position sizing. Let’s briefly compare that to the turtle traders’ rules for trade entries:

  1. You enter a trade when price breaks above its 20-day range
  2. You enter a trade when price breaks above its 55-day range

You are right, not a lot of trade entry rules, although there were small variations and exceptions to the rules. The point is that the professionals understand that entry rules only have very little importance and that the most important cornerstone of any trading strategy is position sizing and risk management. This is a major reason why so many amateur traders struggle; they focus all their energy and spend all their time on the least important factor.


Image Credit

Charts obtained through Tradingview.com

Featured image obtained through unsplash.com


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  1. Many people tell what to do, But you tell us how to do it. This is the best article on risk management. Thanks.

  2. According to the Turtle Rules I’ve read, Units are sized such that 1*N = 1% of Account Equity. The Turtles purchased 1 * Unit and then added 1 * Unit as the price rose .5 of N to a maximum of four units. The very first Unit they bought had its stop loss set to 2% of account equity, $2000 in your example, so they were not limiting their loss by entering in .5% of the account value as far as I know. If they had only bought that first Unit and the market turned against them, they lost the full 2% of account equity.

    Also, it might just be my confusion but it sounds like you are suggesting that the money INVESTED in that one stock was limited to 2% of account equity. It’s the stop loss that is limited to 2% of account equity, not the money invested in that one stock. You’re not buying $2000 of stock. In your first example of the $100 stock with ATR of $2 you can buy 500 shares for a total of $50,000 (50% of your account equity) but the ATR is $2 so your stop at 2N limits your risk to $2000.

    The low volatility of 2/100 makes for a limited portfolio though as you are using half your equity on one trade and you can’t increase your holding to the full 4 units. A higher volatility allows you to buy less stock and thus more Units of that and other stocks which gives you more diversification.

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