How you size copied trades determines your risk profile more than almost any other setting. MirrorLink offers three lot sizing modes, each suited to different scenarios.
Fixed Lot
Every copied trade opens at exactly the lot size you specify—regardless of what the master trades. If you set 0.10 lots, a master's 2.00-lot EURUSD position becomes a 0.10-lot position on your slave.
- Best for: Testing, small accounts, or when you want absolute control over position size.
- Watch out: Doesn’t scale with your equity, so you may need to adjust manually as your account grows.
Multiplier
The slave’s lot size equals the master’s lot size multiplied by your chosen factor. A 1.5x multiplier on a 1.00-lot master trade gives you 1.50 lots on the slave.
- Best for: When you trust the master’s sizing logic and want proportional exposure, either scaled up or down.
- Watch out: If the master increases position size dramatically, your slave follows. Pair this with a max-lot cap.
Balance-Weighted
MirrorLink calculates lot size based on the ratio of slave equity to master equity. If the master has $50,000 and trades 1.00 lots, and your slave has $10,000, the copied trade opens at 0.20 lots.
- Best for: Maintaining proportional risk when master and slave accounts differ significantly in size.
- Watch out: Equity fluctuations during drawdowns can cause sizing drift. Review calibration monthly.
| Mode | Scales with equity? | Needs manual updates? | Risk predictability |
|---|---|---|---|
| Fixed | No | Yes, as account grows | High |
| Multiplier | No (follows master) | Rarely | Medium |
| Balance-Weighted | Yes | No | Medium-High |
Which should you choose?
Start with Fixed Lot during your first week to cap exposure while you learn. Once comfortable, switch to Balance-Weighted for hands-off scaling, or Multiplier if you want tighter alignment with the master’s conviction sizing. Whichever mode you pick, always set a max-lot cap as a safety net.