Master Professional Trading
Position sizing and prop firm compliance
The Risk Advisor helps you calculate proper position sizes for any instrument and stay within prop firm rules. Whether you're trading a personal account or an evaluation, it ensures every trade is sized correctly for your risk tolerance and account constraints.
Load rules automatically for Topstep, Apex, TakeProfitTrader, MyFundedFutures, and Tradeify
Input your account size, risk %, and stop distance to get exact contract sizing
Compare drawdown limits, profit targets, and trading day requirements across firms
Understand the math behind consecutive losses and why proper sizing matters
Select your prop firm to automatically load their specific rules into the Risk Advisor. Supported firms:
After selecting a firm, choose your account size. The calculator will constrain your position sizing to keep you within the firm's rules.
The risk calculator determines how many contracts you can trade based on three inputs:
The calculator outputs the number of contracts and dollar riskfor your trade. It uses the instrument's specific tick value for accurate sizing:
| Instrument | Point Value | Tick Size | Tick Value |
|---|---|---|---|
| ES (S&P 500) | $50 | 0.25 | $12.50 |
| NQ (Nasdaq) | $20 | 0.25 | $5.00 |
| YM (Dow) | $5 | 1.0 | $5.00 |
| RTY (Russell) | $50 | 0.10 | $5.00 |
| CL (Crude Oil) | $1,000 | 0.01 | $10.00 |
| GC (Gold) | $100 | 0.10 | $10.00 |
Compare key rules across popular prop firms to choose the right fit for your trading style:
| Rule | Topstep | Apex | Tradeify |
|---|---|---|---|
| Max Drawdown | $3K-$6K | $2.5K-$7.5K | $2K-$5K |
| Daily Loss Limit | Varies by tier | Varies by tier | Varies by tier |
| Profit Target | $6K-$12K | $3K-$20K | $3K-$9K |
| Min Trading Days | Varies | Varies | Varies |
Values vary by account size and may change as firms update their programs. Always verify current rules on the firm's website.
Understanding the probability of consecutive losses is critical for proper position sizing. Even with a positive-expectancy strategy, losing streaks are mathematically inevitable.
At a 50% win rate, the probability of consecutive losses:
Over hundreds of trades, a 3-loss streak is virtually guaranteed. A 5-loss streak is likely. Your position sizing must survive these streaks without blowing your account or hitting prop firm limits.
The formula: P(n consecutive losses) = (1 - win rate) ^ n