Can the multiplier be a decimal?

Yes. Any value from 0.01 to 100 works, for example 0.2 or 0.35.

If the master adds positions, do I add too?

Yes. For every new trade the master opens, you open one at the same multiplier.

Does changing the multiplier affect positions already open?

No. The new multiplier applies from the next new trade; open positions are not topped up or reduced.

How to set the copy multiplier: size lots to your balance

The copy multiplier sets your lot size as a multiple of the master's. Base it on the balance ratio, remember that minimum lot sizes round small trades up, and check contract sizes across brokers.

Niubang editorial · Updated 2026-11-13

What the multiplier means

Copy multiplier = your lot size ÷ the master's lot size. If the master opens 0.10 lots and you set 0.5x, you open 0.05 lots.

The multiplier can be any value from 0.01 to 100. When the master adds to, reduces or partly closes a position, you follow with the same multiplier.

Start from the balance ratio

If the master's account holds about 10,000 and yours about 2,000, the ratio is 0.2, so start at 0.2x or lower. If unsure, go smaller, run it for a week or two, then adjust based on the actual lots and drawdown.

You can change the multiplier in My subscriptions (我的跟单). The new value applies from the master's next new trade; partial closes of positions already open still use the multiplier they were opened with.

Minimum lot sizes round up

The calculated size is rounded to the broker's lot step, and anything below the minimum lot is sent at the minimum (0.01 lots at most brokers).

If the master opens 0.01 lots and you set 0.3x, the result is 0.003 lots, but 0.01 lots is actually sent. On strategies with many small trades, even a very small multiplier can produce larger positions than expected.

Check contract sizes across brokers

The same symbol can have a different contract size at different brokers, and the engine does not convert it for you. Compare the contract size on both sides under Symbols → Specification in MT5; if one is double the other, adjust the multiplier accordingly.

If the multiplier is too high for your margin, the broker rejects the order; see “What to do when copy orders are rejected”.

Copy trading involves risk, and a strategy's past performance does not guarantee future returns.

FAQ

Can the multiplier be a decimal?: Yes. Any value from 0.01 to 100 works, for example 0.2 or 0.35.
If the master adds positions, do I add too?: Yes. For every new trade the master opens, you open one at the same multiplier.
Does changing the multiplier affect positions already open?: No. The new multiplier applies from the next new trade; open positions are not topped up or reduced.