What is the best turtle trading strategy?

Turtle trading is one of the most documented, tested trend-following strategies. It's worth understanding even if you don't trade it exactly.

The Origin Story

In 1983, legendary trader Richard Dennis made a bet with his friend William Eckhardt. Dennis believed traders could be "grown" through teaching systems. Eckhardt bet that trading talent was inborn.

Dennis recruited 13 "turtles" (he called them that because they were "grown" rather than born), taught them a simple trend-following system, and gave each $1 million to trade.

Over the next four years, these turtles generated average annual returns of 80%. Some years hit 150%+. One turtle returned over 700% annually.

That system is turtle trading.

The Core Strategy

Entry Rule: Donchian Channel Breakout

Buy when price closes above the highest close of the last 20 days. Sell when price closes below the lowest close of the last 20 days.

Example: Looking at the last 20 days of E-mini S&P 500 futures, the highest close was 5,200. Today price closes at 5,210. You buy.

Stop-loss: 2x the 14-day Average True Range (ATR) below your entry.

If ATR is 15 points, your stop is 30 points below entry. On a 5,200 entry, stop is at 5,170.

Position Sizing Rule

Size positions so that hitting your stop-loss costs exactly 2% of your account.

Formula: Position size = (Account size × 2%) / (Entry price - Stop price)

If your account is $100,000, 2% = $2,000. Your risk is capped at $2,000 per trade.

Adding to Winners

The turtles didn't just buy once and hold. They added to winning positions.

If the market continued higher, after every new 2x ATR move, they added another 1/4 position.

Example: - Initial buy: 1 unit at 5,200 - Price rises 30 points (1 ATR), buy another 1/4 unit at 5,230 - Price rises another 30 points, buy another 1/4 unit at 5,260 - Now holding 1.5 units average price 5,230

This pyramiding into winners is critical to turtle trading's success. The real money comes from positions that continue for weeks, with pyramided entries capturing progressively higher prices.

Exit Rules

Close 1/2 your position when it's up 10x your initial risk.

Example: Initial risk was $2,000. 10x is $20,000 profit. At that point, sell half your position, lock in gains.

Let the other half ride. Use a 10-day Donchian trailing stop (exit if price falls below the 10-day low).

This locks in profits while keeping exposure to the big move.

Why Turtle Trading Works

1. Trend Following Captures Big Moves

Turtle trading is a "trend following" system. When markets trend (they do ~30% of the time), this strategy captures the move from early to middle stages.

In a 10% commodity move, turtle trading might capture 6-8% by entering early and exiting on a reversal signal.

2. Position Sizing Prevents Ruin

By risking exactly 2% per trade, the strategy can survive 20-30 consecutive losing trades before account drawdown exceeds 50%.

Most traders blow up during bad stretches. Turtles survive them.

3. Mechanical Rules Remove