Many Forex traders blow their funded accounts not because of poor entry signals, but because of simple mathematical errors in lot-size calculations. With daily drawdown limits of 4-5% enforced strictly by major prop firms, even a tiny oversight can lead to an immediate breach
To protect my own capital and help other traders, I designed and built a client-side lot size and risk calculator optimized for high-leverage prop firm accounts
THE ENGINE AND THE MATHEMATICS
Unlike standard calculators that just look at stop-loss distance, this calculator dynamically processes:
- Live account equity and balance variations
- Dynamic daily drawdown limits (calculating the exact buffer left before a hard violation)
- Custom leverage and broker commission impact
By running all mathematical logic client-side within a highly reactive frontend, the calculations occur instantaneously without any server roundtrips, allowing traders to adjust their parameters in milliseconds
MINIMALIST DARK MODE UI
For traders managing high-frequency setups, UI clutter is a massive distraction. The application features a high-contrast, dark-mode-first aesthetic inspired by Linear and Vercel. We utilized geometric sans-serif typography (Geist and Inter) and monospace styling for numbers to ensure maximum readability under stress
Stop guessing your trade sizes and risking your funded accounts. You can run your calculations instantly with the tool here:
prop-calc.bete.poke.site
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