Why Is Risk Calculation Different at Prop Firms?
On personal accounts, getting risk calculation wrong costs money. At prop firms, getting it wrong can cost the entire account — and the challenge fee. The logic is simple: you are not just risking capital, but access to future funded capital. A consistent risk calculation system is non-negotiable.
The Basic Risk Per Trade Formula
Risk per trade is determined by three variables:
- Account balance: current equity value
- Risk percentage: how much you accept to lose (e.g., 1%)
- Stop loss in pips: distance from entry price to stop
Formula: Amount at risk = Balance × % risk. Lot size = Amount at risk ÷ (Stop in pips × Pip value of the instrument).
Practical Example: EUR/USD
$100,000 account. Risk: 1% = $1,000. Stop loss: 50 pips. On EUR/USD, 1 standard lot = $10/pip. Lot size = $1,000 ÷ (50 × $10) = $1,000 ÷ $500 = 2 lots.
Recommended Risk Percentage for Prop Firms
- Conservative: 0.5% per trade — up to 10 consecutive losses before breaching the 5% daily drawdown
- Moderate: 1% per trade — up to 5 consecutive losses within the daily limit
- Aggressive: 2% per trade — 2 losses already consumes 4% of the daily limit (dangerous)
For most traders on an FTMO challenge, 0.5% to 1% per trade is the safest standard.
Adjusting Risk Based on Accumulated Drawdown
If you have already lost 2% on the day, reduce risk per trade to 0.25% on subsequent positions. If you have lost 3%, end the day. This dynamic adjustment is what protects the most consistent traders.
Automate Risk Control
Manually calculating the ideal lot before every trade is error-prone, especially under emotional pressure. ForexTracker logs your risk per trade and alerts you when you are approaching daily limits — giving you the visibility to adjust lot size before entering the next position.
Calculate and control your risk per trade with precision. Access app.forextracker.com.br for free.
