Understanding Lot Sizes and Position Size Math
guessing your lot size is the fastest way to blow an account. Master the math of standard, mini, and micro lots.
01. Understanding Lot Sizes (Standard, Mini, Micro)
In Forex, position size is measured in lots. A **Standard Lot** is 100,000 units of currency, representing a pip value of roughly $10. A **Mini Lot** (0.10) is 10,000 units ($1 per pip). A **Micro Lot** (0.01) is 1,000 units ($0.10 per pip).
Understanding this scale is critical for adjusting your size to stay within your risk parameters, especially on accounts under $5,000.
02. Calculating Position Size for Capital Control
To protect your account, your position size must adapt to the size of your stop loss. A 10-pip stop loss allows for a larger lot size than a 50-pip stop loss, while keeping the total cash risk identical.
Always perform this calculation before entering a trade. Position sizing calculators are integrated into modern charting software to make this automatic.
03. Leverage vs. Margin Risk
Leverage allows you to trade larger position sizes with a small deposit (margin). While leverage amplifies gains, it equally amplifies losses. High leverage (like 1:500) makes it extremely easy to blow an account on a minor swing.
Keep your actual leverage exposure (not just what the broker offers) under control. Keep risk per trade at 1% regardless of broker leverage.