Calculator 1.0
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Enter your trading details
Risk Disclaimer: The Just Calculator helps manage trading risks and plan withdrawals, using your inputs. It's not for investment advice. Please use it carefully and make informed choices at your own risk.
The Just Calculator ⚖️
By Justus L. Ludovic / @LudovicJustus
Elevate Your Trading
Discover the Just Calculator, a revolutionary tool that redefines money management for traders. Powered by the innovative Justus Criterion, detailed in our paper, it offers a new approach to managing capital, balancing risks, and optimizing reward withdrawals. Gain unmatched clarity and precision in your trading strategy, whether you're a novice or an expert.
Capital :
Drawdown :
Drawdown :
Bank :
Total Value :
Total Value :
Simulation of the Calculator over time for a winning rate of 50%, risk reward ratio of 2, max drawdown of 18% and max risk per trade of 10,000.
To adjust the simulation speed, simply click on the chart.
Clicking "Calculate The Just Size" will restart the simulation with the new settings you've input into the calculator.
🔑 Key Features
Advanced Money Management
By integrating mathematical optimization, the calculator fine-tunes the balance between capital growth and profit security, allowing you to concentrate on trading strategies while it handles optimal money management for you. Details are in our paper.
Personalized Risk Calibration
Customize your maximum drawdown and risk exposure settings, and the calculator will intelligently optimize for growth, aligning with your strategic preferences. If you're unsure what to choose, the calculator will default to the safest and most optimal calibration.
Optimal Earnings Withdrawal
Determine the optimal amount to withdraw after a win, balancing profit security with the momentum of your capital's growth. Earnings are meant to be taken out from the capital so you can use and enjoy your profits from the very first winning trade.
100% Free, Transparent, and Ad-Free Offline Tool
Experience a completely free, client-side JavaScript tool that guarantees data privacy and control, all without any ads to distract you. Download the calculator for seamless offline access and maintain full functionality wherever you are, whenever you need it.
🚀 Begin Your Path to Smarter Trading
Go to the Calculator : Start optimizing your trades now with The Just Calculator.
Read the Paper: Explore the detailed methodology and benefits behind the Justus Criterion.
Simulate / Review Code : View the Python code to simulate trades or to add it to your trading bot or software easily.
Download the Calculator: Ensure uninterrupted access by downloading the entire calculator for offline use.
Join Our Telegram : Drop in to ask questions, notify us of any bugs, or suggest improvements. We're here to help!
Support Us : Contribute to the continued development and improvement of The Just Calculator.
🛠️ How to Use
⚙️ Configuration
Click the gear icon ⚙️ located at the top right corner to open the settings.
1. Currency:
Specify the currency used for displaying capital and withdrawal amounts.
2. Adjust Risk:
- Maximum Drawdown: Indicate your maximum acceptable loss in percentage terms. This value reflects the largest percentage decrease in your total value you're willing to tolerate before halting trading. Without this input, the calculator will automatically apply the Justus Optimal Drawdown method to define this threshold.
- Maximum Risk Amount: Indicate the highest amount you're willing to risk on a trade, taking into account the liquidity of the market you're trading in. If you leave this blank, the calculator will automatically cap your risk at $10,000. Entering a negative value tells the calculator to disregard this limit.
3. Broker Information:
- Fee Per Side: Enter the fee your broker charges for each opening and closing transaction.
- Maximum Leverage: Specify the highest leverage available through your broker.
- Lot Size: For Forex, standard is 100,000 units; for shares or crypto, default is 1 with no lot mechanism.
- Decimal Digits: Forex typically uses 2 for lot decimals; crypto ranges from 8 to 2, defaulting to 8 if unspecified.
- Minimum Order: Indicate the smallest order size accepted by your broker.
- Maximum Order: Specify the largest order size allowed by your broker.
4. Return on Risk Log:
To automate the post-trade calculation of your winning probability and risk-reward ratio, input your last 100 trades's Returns on Risk, one on each line. If left blank, the calculator will log each trade and, once it reaches 100 trades, the automatic calculation will begin.
Click "Apply Settings" to save your configurations.
📊 Usage
Follow these steps to utilize the calculator for your trades:
1. Setting Your Capital
- For Novices: Begin with 20% of your capital as your trading balance; consider the remaining 80% as reserved for profit withdrawals.
- For All Users: Input your current capital and the total amount you've withdrawn as profit.
2. Strategy Input
Enter your win rate and risk-reward ratio based on your last 100 trades. To maintain accuracy, update these figures after each trade. If the expected value is negative, the calculator advises the smallest possible order size to help you return to profitability.
3. Trade Input:
Input your "Entry Price" and "Stop Loss" levels. The calculator will show your fee-to-risk ratio, highlighting the impact of fees on potential losses. A ratio above 20% suggests reevaluating your trade to improve profitability.
4. Calculating The Just Size:
With the Justus Criterion, find the ideal trade size. A single click copies this number for convenient use.
5. Trade Outcome:
Specify your post-trade balance or the trade profit / loss, factoring in all trading costs. This step is crucial for accurate ongoing calculations.
6. Calculating The Just Withdrawal:
Post-win, the calculator proposes the best withdrawal amount, automatically copying it for you. After a loss, it might suggest withdrawing some capital to manage risks within your maximum drawdown limit.
7. Preparing for the Next Trade:
Copy your trade data for easy record-keeping. Log each trade into your spreadsheet, find your new average win rate and risk reward ratio and you're set for the next one.
By following these steps, you can effectively manage and optimize your trading strategy with The Just Calculator. Remember to regularly update your inputs for the most accurate guidance. For additional support or guidance, join our Telegram group.