Backtest engine

Turtle Trading Simulator

Experience the legendary Turtle breakout system with real historical data. Fine-tune parameters, run powerful backtests, and evaluate performance — completely risk-free.

Free · No signup Daily data Any ticker

Turtle System Presets

Any stock, ETF, or commodity — e.g. GLD, QQQ, USO, SLV
20d = System 1, 55d = System 2
Backtest runs from this date through today
Initial equity; sizing uses equity × risk % each bar
% of account equity: Shares = (Equity × Risk %) ÷ (ATR × Multiplier)
Typical Turtle: 2
Typical Turtle value: 2× ATR
0.5 = aggressive pyramiding, 1–2 = conservative
Classic Turtle: 4 units max · each add multiplies exposure as the trend extends
0 = off · 200 = 200-day MA (longs only above MA, shorts only below)
When at max units, a new breakout signal still tightens the stop

Adjust parameters and launch the backtest to view performance metrics.