Funded Trader
Risk Calculator
Calculate the exact lot size for every trade — with built-in challenge protection limits that keep your drawdown clean.
POSITION SIZER
Multi-Asset Protocol
Your current account equity or challenge balance
Trade90 Safety System: 0.5% max per trade
Your planned trade entry price
Price where your trade idea is invalidated
Your target — used to calculate R:R ratio
Recommended Position
✓ SAFEStandard Lots
Total Risk
$500.00
R:R Ratio
1:1.00
Stop Pips
50.0
The Problem
Why Standard Calculators Fail Funded Traders
Generic position size calculators were built for retail trading. They solve for lot size — and stop there. That's not enough when you're trading a funded account with hard drawdown limits.
No Risk Guardrails
Generic calculators will let you size 5% of your account on a single trade without any warning. One stop-out and your daily limit is gone.
No Daily Budget View
They don't track how much risk you've used today. You can unknowingly stack multiple trades and blow through your daily drawdown allowance.
No Safe Trades Count
Standard tools don't tell you how many more trades you can safely take before reaching a challenge drawdown boundary.
Trade90 Framework
The Two Rules Every Funded Trader Must Follow
These are Trade90's internal safety guidelines — not official rules of any prop firm. They're designed to keep you safely inside the drawdown limits of all major funded account programs.
0.5% Max Per Trade
On a $100,000 account, 0.5% equals $500 risk per trade. This may feel small — it isn't. Here's what it protects you from:
// $100k account — 5% daily limit
Daily limit = $5,000
0.5% per trade = $500
Trades to hit limit = 10 losses
// vs. 2% per trade
2% per trade = $2,000
Trades to hit limit = 2.5 losses
1% Daily Risk Target
Your total risk across all trades in a single day should not exceed 1% of account equity. Think of it as a daily risk budget.
// $100k account — daily budget
Daily budget = $1,000 (1%)
Trade 1: 0.5% = $500 used
Trade 2: 0.5% = $500 used
Budget remaining: $0 — stop trading
// Daily limit still 80% intact
Disclaimer
These are Trade90's internal safety guidelines, not official prop firm rules. Always verify the specific drawdown limits and trading rules of your funded account program before trading.
Drawdown Survival Analysis
How Risk Per Trade Affects Challenge Survival
This table shows account drawdown after 5 and 10 consecutive losses at different risk levels, compared to a standard $100k challenge with a 10% max drawdown limit.
| Risk Per Trade | 5 Losses | 10 Losses | $100k Challenge |
|---|---|---|---|
| 2.0% | -10.0% | -18.3% | ❌ Failed (most firms) |
| 1.0% | -5.0% | -9.6% | ⚠️ Near daily limit |
| 0.5% | -2.5% | -4.9% | ✅ Inside all limits |
| 0.25% | -1.25% | -2.5% | ✅ Maximum runway |
Compound drawdown calculated using (1 - r)^n − 1 formula. $100k challenge assumes standard 10% maximum drawdown rule.
FAQ
Frequently Asked Questions
Does this work for FTMO?
Yes. The Trade90 calculator is compatible with all major prop firms including FTMO, E8 Funding, The Funded Trader, Apex Trader Funding, and any other funded account program. The 0.5% per-trade risk rule is a conservative safety guideline that sits well inside the drawdown limits of every major prop firm challenge. You can also use it for Phase 1, Phase 2, and live funded accounts.
What is the 0.5% rule in funded trading?
The 0.5% rule means you risk no more than 0.5% of your current account equity on any single trade. On a $100,000 funded account that equals $500 maximum risk per trade. This rule exists because prop firm daily loss limits are typically 4–5% of account balance. At 0.5% per trade you need 8–10 consecutive losses before approaching a daily limit — giving you a strong buffer against natural variance and bad days.
Should I risk the same on every trade?
Not necessarily. Many funded traders use a tiered model: 0.25% for lower-conviction setups, 0.5% for standard setups, and up to 1% for their highest-conviction trades. The key constraint is that your total daily risk across all open and pending positions should stay at or below 1% of account equity. Consistency in your sizing rules matters more than the specific percentage you choose.
Related Tool
FTMO Position Size Calculator
FTMO-specific reference table, challenge limits, and worked examples for Phase 1 and Phase 2.
Learn More
Prop Firm Risk Management Guide
The complete guide to protecting your funded account: daily limits, drawdown math, and survival mode rules.
Looking for deeper analysis, trading psychology insights, and prop firm strategy breakdowns?
Read the Trade90 Blog →