Prop Firm Intraday Trailing Drawdown Calculator

Quick Calculator Overview

Calculate realistic timelines for prop firm challenges that use Intraday Trailing Drawdown (ITDD) rules. This calculator helps prop traders and funded account users evaluate whether their trading strategy can reach profit targets while surviving the "erosion effect" of trailing drawdown rules that tighten your maximum loss limit with each winning day.

How to Use the Calculator

Step 1: Set Your Account Size

Enter your starting trading capital (typically $25K, $50K, $100K, or $150K depending on your challenge or funded account).

Step 2: Enter Your Profit Target

Input the total profit required to pass your evaluation or reach your trading goal (e.g., $3,000 for most $50K challenges).

Step 3: Input Maximum Loss Limit

Enter your starting maximum loss before account breach. This is usually $2,000-$3,000 for most prop firms.

Step 4: Define Your Daily Profit

Input your average profit on winning days based on your trading strategy and position sizing.

Step 5: Set Your Daily Loss

Enter your average loss on losing days, including all trading costs (commissions, spreads, slippage).

Step 6: Adjust Your Win Rate

Set your realistic win rate percentage based on backtesting or proven track record.

Step 7: Enter Average Intraday Run-Up

Input how much your trades typically go positive before you take profit (this simulates how trailing rules might tighten during run-ups).

Understanding Your Results

Success Indicators

🟢 Green Banner: "Profit Target Appears Achievable" - Your strategy should work within ITDD limits

🟡 Yellow Banner: "High Risk: Intraday Trailing Drawdown Likely to Fail" - Profitable strategy but ITDD erosion will likely stop you out

🔴 Red Banner: "Target unreachable with current parameters" - Strategy loses money over time

Calculator Limitations

• Provides teaching proxy for trailing drawdown concepts using simplified "wins-only erosion" model
• Assumes consistent daily performance (real trading involves variance and streaks)
• Doesn't simulate actual intraday trailing mechanisms or daily equity curve fluctuations
• Uses rounded win/loss day estimates rather than precise broker ITDD rules
• Results depend entirely on accuracy of your input parameters

Market Factors Not Considered

• Complex broker-specific ITDD rule variations
• Psychological factors affecting performance during drawdown pressure
• Strategy adjustments that may occur when approaching limits
• Actual intraday price movements and trailing mechanisms