What is Sizing Multiplier?
Quick answer
A sizing multiplier scales copied trades relative to the leader’s, so a value below one makes your positions smaller than theirs and above one makes them larger. It is how you match a leader’s trades to your own account size and risk tolerance, rather than blindly mirroring their dollar amounts.
A sizing multiplier is one of the most important settings in copy trading, because it decides how big your copied positions are relative to the trader you follow.
How the sizing multiplier works
When a leader places a trade, the multiplier scales the size of the matching order in your account. A multiplier of 0.5 makes your position half the proportional size, while a multiplier above one makes it larger. Combined with a maximum dollar amount per trade, it keeps a leader with a large account from putting an outsized position into your smaller one. It is the main lever for making someone else’s strategy fit your account.
Why it matters in copy trading
Conservative sizing is the single most reliable way to manage risk when copying. A multiplier below one, together with a per-trade cap, keeps each copied position small relative to your account, which is what helps you survive a leader’s rough patches. Setting the multiplier thoughtfully, rather than mirroring the leader’s full size, is often the difference between a manageable drawdown and a painful one.
Frequently asked questions
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