Why Lot Sizing Matters in Copy Trading
When you copy trades from one account to another, the lot size on the slave account needs to make sense for that account's balance and risk tolerance. A 1.0 lot trade on a $100,000 master is appropriate, but copying 1.0 lots to a $5,000 slave is reckless. Lot sizing modes solve this problem automatically.
Mode 1: Fixed Lot
How it works: Every copied trade uses the same lot size, regardless of the master's lot size. If you set 0.1, every slave trade is 0.1 lots.
Example: Master opens 2.0 lots EURUSD → Slave opens 0.1 lots EURUSD.
Best for:
- Small accounts where you want absolute control over position size
- Testing a copier with minimal risk
- Accounts where risk should never exceed a specific lot amount
Mode 2: Lot Multiplier
How it works: The slave's lot size = master's lot size × multiplier. A 2x multiplier doubles the master's lots; 0.5x halves them.
Example (0.5x): Master opens 1.0 lots → Slave opens 0.5 lots.
Best for:
- Accounts of similar size where you want proportional but adjusted sizing
- Scaling up (2x) or scaling down (0.5x) a strategy on a second account
Mode 3: Balance Ratio
How it works: The copier calculates the ratio between slave balance and master balance, then scales the lot size. If the master has $50,000 and the slave has $10,000, the ratio is 0.2 — a 1.0 lot master trade becomes 0.2 lots on the slave.
Example: Master ($50K) opens 1.0 lots → Slave ($10K) opens 0.2 lots.
Best for:
- Account managers with clients of different account sizes
- Prop firm traders copying from a personal account to a funded account
- Any setup where accounts have different balances
Mode 4: Risk Percentage
How it works: Each trade risks a fixed percentage of the slave account's balance. The copier calculates the lot size based on the stop loss distance and risk amount.
Example (1% risk): Slave has $10,000, stop loss is 50 pips → Lot size = $100 risk / (50 pips × $10/pip) = 0.2 lots.
Best for:
- Risk-consistent trading across accounts
- Prop firm accounts where drawdown limits require precise risk control
- Traders who use a fixed risk-per-trade methodology
Quick Reference Table
| Mode | Calculation | Best Use Case |
|---|---|---|
| Fixed Lot | Always the same lot size | Testing, small accounts |
| Multiplier | Master lots × factor | Similar-sized accounts |
| Balance Ratio | Master lots × (slave balance / master balance) | Different-sized accounts |
| Risk % | Calculated from risk amount and SL distance | Consistent risk per trade |
All four modes are available in ConnectXCopy for every copier. You can mix and match — use balance ratio for client accounts and fixed lot for your test account — all from the same master.