Quick answer
Start with a simple sizing mode until you confirm everything copies correctly. Risk-based modes are powerful, but they depend more heavily on clean stop-loss data and broker constraints.
What each sizing mode does
- Balance Multiplier: scales the trade by account-balance ratio. Good for simple proportional copying when balances are reliable.
- Lot Multiplier: multiplies the master lot size by a fixed value. Good for predictable first tests.
- Fixed Lots: always uses the same lot size on the receiver, regardless of the master size.
- Risk %: sizes the trade from the receiver balance and the stop-loss distance.
- Risk $: sizes the trade from a fixed cash-risk amount and the stop-loss distance.
Important notes from the current app
- Balance multiplier depends on both sides having fresh balance data. If balances are not available, the trade can be skipped and shown in Copy Health.
- Risk percent and risk dollar both depend on a usable stop loss. If SL is missing or unusable, the result may fall back to a minimum lot size or an unexpected safe fallback.
- Different brokers can enforce different minimum lots, maximum lots, lot steps, and contract sizes.
Most common causes of wrong lot size
- Wrong sizing mode for the use case.
- Missing or invalid stop loss on a risk-based mode.
- Receiver broker lot-step or margin limits.
- Cross-platform differences such as futures versus CFD sizing.
How to verify the result
- Place one tiny test trade.
- Open Logs and confirm the lot size that landed on the receiver.
- If something still looks wrong, check Wrong lot size or order rejected.