Risk of Ruin Calculator for Traders | Drawdown Risk
Risk of Ruin Calculator: How to Use the Tool
Why Use a Risk of Ruin Calculator?
Even a profitable trading strategy can eventually fail if the risk per trade is too high. The TLAP Risk of Ruin Calculator estimates your Risk of Ruin — the probability that your trading account will suffer irreversible losses — and helps you identify a safer level of risk before trading live.
Understanding your Risk of Ruin allows you to build a more robust risk management plan and improve the long-term survivability of your trading account.
How to Use the TLAP Risk of Ruin Calculator
To calculate your Risk of Ruin, enter the following strategy parameters:
Reward-to-Risk Ratio. Enter the ratio between your average winning trade and average losing trade. For example, a value of 5 means your profit target is five times larger than your stop-loss. If your stop-loss is 10 pips, your take-profit target would be 50 pips.
Win Rate (%). Enter the percentage of winning trades. You can find this value in your trading platform's performance report or trading history.
Risk per Trade (%). Specify the percentage of your account balance you are willing to risk on each trade. Most traders use 1–2%. If you need to calculate the appropriate position size, use the TLAP Lot Size Calculator.
Understanding the Results
After entering your strategy parameters, the calculator automatically estimates your Risk of Ruin and shows how changes in risk affect your account's long-term survivability.
A higher Risk of Ruin indicates a greater probability of account ruin over time. In general, traders should aim to keep this value as close to 0% as possible and ideally below 1%.
The calculator helps you evaluate:
the probability of account ruin;
whether your chosen risk per trade is appropriate;
how changes in position size affect long-term account survivability;
whether your strategy can withstand an extended losing streak.
Even a modest reduction in risk per trade can significantly reduce the Risk of Ruin while preserving much of a strategy's long-term return potential.
Using the Risk of Ruin Calculator for Strategy Analysis
The Risk of Ruin Calculator is an essential risk management tool for evaluating the long-term viability of a trading strategy.
It is particularly useful after completing a backtest or analyzing your trading history.
Once you know your strategy's Win Rate and Reward-to-Risk Ratio, you can evaluate different levels of risk—such as 0.5%, 1%, 2%, or 3% per trade—to see how they affect your Risk of Ruin. This allows you to select an appropriate risk per trade before committing real capital.
Example: How Risk per Trade Affects Risk of Ruin
Reward-to-Risk | Win Rate | Risk per Trade | Risk of Ruin |
|---|---|---|---|
5.0 | 30% | 1.5% | 0.0000% |
3.0 | 30% | 2.0% | 0.1628% |
1.0 | 50% | 2.0% | 0.2431% |
0.5 | 70% | 2.0% | 0.0037% |
Benefits of the TLAP Risk of Ruin Calculator
The TLAP Risk of Ruin Calculator helps you:
estimate the probability of account ruin before risking real capital;
understand how changes in risk per trade affect long-term account survivability;
compare different risk management scenarios before trading live;
apply the same risk management principles across Forex, CFDs, stocks, cryptocurrencies, and other markets;
make objective trading decisions based on quantitative analysis rather than emotion.
For a complete risk management workflow, use the Risk of Ruin Calculator together with the TLAP Lot Size Calculator and TLAP Margin Calculator.