Most prop challenges end on a rule, not a bad strategy: a daily loss limit measured on equity, a trailing drawdown that rose with open profit, or a reset at an unexpected time zone.
FloorGuard's free calculator does the math. Pick your firm and program (FTMO, FundedNext, The5ers, E8 Markets, FundingPips, Alpha Capital, Blue Guardian, Topstep, Apex), enter balance, equity and today's P&L, and see your daily-loss floor and room left, your static or trailing max-drawdown floor, the largest position whose stop keeps you above the tighter floor, and a green/amber/red status.
Each preset links to the firm's rules page with a last-checked date. Runs in your browser, no sign-up. Dataset and library are open source (MIT).
Also in development: a guard that flattens your own positions before a limit is hit (optional $29/mo founding membership, refundable before launch).
Not affiliated with any prop firm. Always confirm rules with your firm.
I kept seeing traders fail prop challenges on a rule they misunderstood rather than on their strategy, like a daily loss measured on equity or a trailing drawdown that crept up with unrealised profit. Every firm words these rules differently, so I collected each firm's published rules with sources and dates and built a calculator that shows exactly where your floors are.