Lot Size Calculator for FTMO Challenges
Trading prop firm challenges requires precise position sizing to stay within strict risk parameters. This calculator helps you determine appropriate lot sizes while respecting typical prop firm rules like 5% max daily drawdown and 10% max total drawdown.
FTMO challenges have hard drawdown limits that retail accounts don't. One oversized trade can end your challenge instantly. Unlike personal trading where you can deposit more, prop challenges give you exactly ONE chance. Your position sizing must account for worst-case scenarios—consecutive losses, slippage during news, and gap risk. Most failed challenges aren't due to bad strategy, but poor position sizing.
Important Notice
This tool is not affiliated with FTMO. Always verify current rules directly with the prop firm as they may change.
Example Calculation
Step-by-step lot size calculation for FTMO:
The Formula
Step 1: Your Trading Parameters
Instrument
EURUSD
Account Size
$100,000 (challenge)
Risk Per Trade
0.5%
Stop Loss
20 pips
Step 2: Risk Amount
$500
Maximum loss per trade
Step 3: Lot Size
$500 ÷ (20 pips × pip value)
2.50 lots
Risk exactly $500 with 20 pips SL
💡 Note: Lot size determines your risk, while leverage determines your margin requirement. With higher leverage (e.g., 1:100), you need less margin to open the same position, but your risk stays the same.
FTMO Volatility: Risk management focused - Stay within drawdown limits
Frequently Asked Questions
Common questions about FTMO lot sizing.
This page is part of our main Lot Size Calculator, which supports all forex pairs, indices, and crypto.
For a $100,000 FTMO challenge with 5% max daily loss ($5,000), risking 0.5% per trade ($500) with a 20-pip stop allows approximately 2.5 standard lots. Conservative sizing prevents hitting daily limits.