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The exact numbers 80% of traders don't check before entering a challenge.Stop guessing. Start surviving.

Safe lot sizes for every major firm
3 drawdown mistakes that blow accounts
Red-flag firms to avoid in 2026
The 1-minute pre-trade risk check

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Know Your Exact Safe Lot Size Before Every Trade

The free calculator that tells you exactly how many lots you can trade without blowing your prop firm account. Trusted by 13,000+ traders at FTMO, E8, FundedNext & more.

Universal Drawdown Calculator

Works for any prop firm — select a preset or enter custom rules

Enter your trade parameters and click Calculate to see your safe lot size and survival probability

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Answer 6 questions, get a personalized firm recommendation based on your style, budget & experience. Free, no signup.

Your Unfair Advantage Against the 80%

80% of traders fail prop challenges. These free tools are built to make sure you're in the 20% that pass.

Top Prop Firms Compared

Honest side-by-side comparison — no bias, no hidden agendas

See Full Comparison
FirmMax DDDaily DDProfit SplitCost
F
FTMO
★ 4.8
10%5%80-90%From $155Details
E
E8 Markets
★ 4.5
8%5%80%From $48Details
F
FundedNext
★ 4.6
10%5%80-90%From $59Details

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Trading Guides

Actionable education — not SEO filler

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Why 80% of Traders Fail Prop Challenges

The real reasons most traders blow their accounts and exactly how to avoid each one.

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How to Calculate Safe Lot Size

Step-by-step guide to position sizing that keeps you within drawdown limits.

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FTMO vs E8: Which is Right for You?

An honest head-to-head comparison to help you pick the best firm for your style.

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Frequently Asked Questions

What is a drawdown calculator and why do prop traders need one?
A drawdown calculator helps prop traders determine the maximum lot size they can safely trade without violating their firm's drawdown rules. It considers your account size, current equity, maximum drawdown percentage, and daily drawdown limits to calculate how much room you have before hitting a breach. This is critical because violating drawdown limits means instant disqualification from most prop firm challenges.
Is PropSurvivalEngine really free?
Yes, all tools on PropSurvivalEngine are completely free and always will be. The drawdown calculator, firm comparison engine, trading guides, and Chrome Extension are available to everyone with no sign-up required. We earn revenue through affiliate partnerships with prop firms, which are always clearly disclosed.
Which prop firms does PropSurvivalEngine support?
PropSurvivalEngine currently supports FTMO, E8 Markets, FundedNext, The5ers, and Apex Trader Funding. Our calculator also works with custom drawdown rules, so you can use it with any prop firm by entering your specific parameters.
How does the Chrome Extension help prevent drawdown violations?
The PropSurvivalEngine Chrome Extension provides real-time drawdown tracking, trade session limits, loss streak circuit breakers, daily P&L guardrails, emotional check-ins, and session timers. It actively monitors your trading and sends alerts before you approach dangerous levels, helping you stay disciplined during your challenge.
What is a safe lot size for prop trading?
A safe lot size depends on your account size, remaining buffer before drawdown, and stop loss distance. As a general rule, never risk more than 1-2% of your remaining drawdown buffer on a single trade. Use our calculator to get your exact safe lot size for any prop firm's rules.