Understanding probability and risk management is crucial for successful trading. This advanced calculator helps you analyze potential outcomes and optimize your trading strategy through statistical analysis and Monte Carlo simulations.
Control potential losses through proper position sizing and risk allocation per trade.
The percentage of profitable trades in relation to total trades executed.
The relationship between potential profit and potential loss for each trade.
Determining the optimal trade size based on your account balance and risk tolerance.
Enter your starting trading account balance. This will be used as the base for calculations.
Choose between percentage-based or fixed amount risk per trade. This determines how much you're willing to risk on each position.
Input your expected win rate as a percentage. This can be based on historical performance or strategy backtesting.
Set your target reward compared to risk. A ratio of 2 means you aim to make twice what you risk per trade.
Enter the number of simulations to run (e.g., 1000). This powerful tool helps you see potential account growth paths, understand maximum drawdown risks, calculate probability of reaching profit targets, and make data-driven decisions about position sizing.
The calculator provides comprehensive analysis of your trading strategy. Here's how to interpret the key metrics:
The projected profit based on your win rate, risk/reward ratio, and number of trades.
The largest potential decline in account value during the trading period.
The statistical distribution of winning and losing trades over time.
Optimal position sizing based on your win rate and reward/risk ratio.
Result Analysis: This strategy performs best on high-liquidity exchanges with low maker/taker fees.
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A Monte Carlo simulation plays out your trading strategy hundreds or thousands of times with randomized trade outcomes based on your win rate and risk:reward ratio. Instead of one backtest curve, you see the full range of realistic outcomes — best case, worst case, and everything between — which reveals how much of any single result is skill and how much is luck.
Because win rate means nothing without the risk:reward ratio. A trader who wins 90% of the time but loses $1,000 on each losing trade while making $50 on winners has negative expectancy and will lose money over time. Profitability requires your win rate to be above the break-even rate for your risk:reward — you can check both with the win rate calculator.
Far more likely than intuition suggests. With a 50% win rate, the chance of at least one 10-trade losing streak in 1,000 trades is roughly 62%. Losing streaks are a statistical certainty for every strategy, which is why position sizing matters more than entry signals — see the risk of ruin calculator for what a normal streak does to your account at different risk levels.
As a rule of thumb, at least 100 trades for a rough estimate and 300+ for reasonable confidence. With only 30 trades, a true 50% win rate can easily show up as anything from 35% to 65% by pure chance. Running your numbers through the simulator shows how wide that uncertainty band really is.