Buffer-Aware Position Sizer

Prop Firm Lot Size & Risk Sizer

Never blow another challenge due to miscalculated position sizes. Sizes trades relative to your actual remaining daily loss buffer, stopping auto-liquidation before it happens.

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%

Max daily loss budget: $5,000

Current Day Drawdown Buffer Status Critical for Prop Firms
$
-$
pips
pips
%

20% of your remaining daily buffer gives you 5 consecutive losses before hitting breach.

Verifies whether margin will be rejected by broker.

Position Sizing Output Live Calculated

Recommended Safe Lot Size
3.33 Lots
Max Dollar Loss on SL: $1,000.00
Daily Buffer Remaining $5,000.00
Trade takes 20.0% of remaining daily life 5 Losses Left
Pip / Point Value
$33.33
per 1.0 pip move
Breach "Death" Lot Size
16.67 Lots
Instant daily fail on SL
Profit at TP (Target)
+$2,000.00
Risk:Reward 1:2.0
Margin Required
$3,333
Within Free Margin
Conservative Risk Profile

Your position is safely budgeted. You can sustain 5 consecutive losing trades today before reaching your prop firm's daily liquidation threshold.

Formulas updated for 2026 prop firm rules

Why Standard Lot Size Calculators Blow Prop Firm Accounts

1

Nominal Balance vs Actual Buffer

When you trade a $100,000 challenge with a 5% daily drawdown, your true daily spending capital is $5,000, not $100,000. If you risk standard 1% ($1,000) based on nominal balance, you are effectively risking 20% of your entire remaining life in a single trade.

2

The Realized Loss Trap

If you take two small losses early in the session totaling -$1,200, your remaining daily buffer shrinks to $3,800. Sizing your 3rd trade with standard lot calculators without factoring in today's closed losses leads to instant breach on normal market volatility.

3

Index & Gold Contract Traps

Different brokers and prop firms configure US30, NAS100, and Gold with distinct contract multipliers (e.g. $1 per point vs $10 per point). This tool uses calibrated tick specifications matching standard MetaTrader prop firm feeds.

Frequently Asked Questions

How is Daily Drawdown calculated across FTMO, FundedNext, and Funding Pips? ↓

At 00:00 server time (CE(S)T for FTMO), the daily baseline is recorded. In balance-based models, your daily max loss is calculated as 5% of starting day balance. In equity-based models, if you hold open floating positive profit at midnight, your daily drawdown limit is higher, narrowing your buffer. Always use today's starting balance or equity, whichever is higher, for safety.

What percentage of the daily buffer should I risk per trade? ↓

Quantitative prop traders recommend risking no more than 10% to 20% of your remaining daily buffer per setup (equivalent to 0.5%–1.0% of nominal balance on an intact account). This guarantees you can absorb 5 to 10 back-to-back losses before hitting liquidation.

Exclusive Trader Kit 2026

Forex EA & Risk Management Cheat Sheet

Download the complete quantitative guide: Position Sizing Formulas, Prop Firm Drawdown Rules, and MQL5 Parameter Cheat Sheets.

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