Proportional Sizing Engine

Copy Trading Lot Multiplier Calculator

Eliminate account blowouts caused by copying at the wrong scale. Calculate the exact lot multiplier ratio needed to mirror a master trader without over-leveraging your capital.

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Help your community or PAMM investors size trades safely. Free responsive widget embed.

$

The signal master's current account balance.

$

The balance in your copying trading account.

Lots
Trade Copier Compatibility Presets

Calculated Sizing Specs Live Result

Set Copier Multiplier To
0.20 x
Your Executed Trade Size: 0.20 Lots
Capital Ratio 20.0%
of Provider capital
Max Drawdown Equiv. 1:1 Matched
Equal % drawdown
Recommended Configuration:

In your trade copier settings (SocialTraderTools, TradeSync, or MT4/MT5 Copier), select "Custom Lot Multiplier" and enter 0.20. Your risk will match the provider's exact risk curve.

Formula: (Follower / Master) × Risk Scale
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Risk Architecture Guide

Quantitative Execution & Risk Control Principles

01

Equity Proportional Sizing

Fixed lot sizing without balancing capital disparity leads to sudden liquidation. Scale lot multipliers strictly proportional to provider equity.

02

Latency & Slippage Drag

Execution delays (50ms–500ms) and broker spread markups can erode up to 30% of a scalper's gross yield. Monitor real net yield with slippage modeling.

03

High-Water Mark (HWM) Protection

Never pay performance fees on recovered losses. Strategy managers should only earn performance splits on net new all-time highs.

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