Position Sizing: The Foundation of Account Survival
Correct position sizing is the single most important risk management skill. It determines whether you survive long enough to benefit from your edge.
Risk Management · May 2, 2026 · 5 min read
Most traders focus on finding good entries. Professionals focus on position sizing. Your entry quality determines if a trade works; your position sizing determines whether a string of losses destroys your account or merely inconveniences it. With correct sizing, you can be wrong 60% of the time and still grow your account.
The Fixed Percentage Method
The simplest and most widely recommended approach is to risk a fixed percentage of your account on each trade — typically 0.5%–2%. If your account is $10,000 and you risk 1%, you risk $100 per trade. Your stop loss distance then determines your position size: if your stop is 50 pips in EUR/USD and you risk $100, your position size is 2 mini lots (where 1 pip = approximately $1 per mini lot).
Scaling and Anti-Martingale
Two approaches to scaling: anti-martingale (increase size when winning, decrease when losing) and fixed percentage (keep size proportional to account equity regardless of recent performance). Anti-martingale is more aggressive and compounds gains faster in good periods; fixed percentage is more stable across variance. Never use martingale (doubling size after losses) — it is mathematically guaranteed to ruin any account given enough trades.
What Is R-Multiple in Trading? (And Why It Changes Everything)
Position Sizing: The Only Risk Management Skill That Matters
Risk-Reward Ratio: The Complete Guide Every Trader Must Read