Prop Firm Math
The Mathematical Blueprint Behind Passing in 1–3 Trades
The most common reason traders fail prop firm evaluations (such as FTMO, FundedNext, Funding Pips, and The5ers) is not lack of technical analysis knowledge—it is uncalibrated position sizing and drawdown fragility.
When a trader risks an arbitrary 1.5% or 2.0% per trade, two consecutive losses push the account into a 4% drawdown, dangerously close to the standard 5% daily loss limit. The Prop Pass Engine eliminates this by back-calculating your exact required risk from the target profit and scaling it across high-conviction 4R trades.
Next Risk % = Min(Remaining Target / (Current Balance * 4.0 * TradesToPass), MaxDailyLoss - 0.5%, DrawdownLeft / Current Balance - 0.5%)
The 4.0x R Multiplier Engine
Rather than aiming for full 1:1 or 1:2 R:R targets that require 8–10 consecutive wins, the Prop Pass Engine leverages a professional two-target partial execution model:
- TP1 (Partial Target): 3.0 R:R on 50% volume (+1.5R gain). Stop loss moved to breakeven.
- TP2 (Runner Target): 5.0 R:R on 50% volume (+2.5R gain).
- Full Win Return: +4.0R total profit on risk per completed setup.
Automatic Drawdown & Daily Loss Guardrails
The engine automatically detects when your account equity is approaching critical thresholds:
- Daily Loss Cap: Risk is strictly clamped 0.5% below your daily limit so one loss can never breach daily rules.
- Trailing Max Drawdown Cushion: Sizing dynamically scales down if the account enters drawdown, ensuring mathematical survival.
- Target Locked: Sizing recalculates after each win, locking in progress toward funded status.
Comparison Matrix
Phase 1 vs. Phase 2 Challenge Roadmaps
| Evaluation Phase | Profit Goal | Max Drawdown | Daily Loss Limit | 3-Trade Risk Per Trade |
|---|---|---|---|---|
| Phase 1 ($10,000 Account) | 8% ($800) | 10% ($1,000) | 5% ($500) | 0.67% ($66.67) |
| Phase 2 ($10,000 Account) | 5% ($500) | 10% ($1,000) | 5% ($500) | 0.42% ($41.67) |
| Phase 1 ($100,000 Account) | 8% ($8,000) | 10% ($10,000) | 5% ($5,000) | 0.67% ($666.67) |