Lot Multiplier
Also known as: copy ratio, volume multiplier
What is it?
A lot multiplier is a setting used when you copy or mirror another account's trades, and it scales the size of their positions to fit yours. When you follow a leader, you rarely want to match their trades lot-for-lot, because their account is probably a different size from yours - copying a large account's full trade size into a small account would put far too much at risk. The multiplier solves this by taking the source trade's size and multiplying it by a factor you choose to produce the size used in your account.
A multiplier of 0.5, for instance, means every trade you copy is half the size of the leader's; a multiplier of 1 matches them exactly. The value for a beginner is control over your real risk: you can follow a much larger or smaller account proportionally and keep each copied trade sensibly scaled to your own balance and comfort. The temptation to avoid is setting the multiplier above 1 in the hope of amplifying the leader's gains.
That works in both directions - it scales up the leader's losing trades and drawdowns just as fast as the winners, which can turn a manageable rough patch into a serious one. The safest practice is to set the multiplier from the ratio of your balance to theirs and your own risk tolerance, not from a wish for bigger returns. The multiplier changes how much you risk; it does not change whether the underlying trades win or lose.
Why it matters: It lets you follow a larger or smaller account proportionally instead of blindly matching lot-for-lot, which controls your real risk.
Your lot = source lot x multiplier
The multiplier directly scales every copied trade's risk and reward.
Real-world example
A 0.5x multiplier turns the leader's 2-lot trade into 1 lot in your account, matching your smaller balance.
How SignalBots handles it
SignalBots' copy and mirror connectors apply your lot multiplier so the source's size maps sensibly onto your account. See /risk-warning.
Pro tip
Set the multiplier from your balance ratio and risk tolerance, not from a wish to amplify the leader's returns.
Common pitfalls
Using a multiplier above 1 to chase bigger gains, which scales the leader's drawdowns up just as fast.
Frequently asked questions
Should my lot multiplier be above 1?
Rarely. Above 1 amplifies the source's losses as much as its gains; most followers set it at or below their balance ratio.
How do I choose the right multiplier?
Base it on how your balance compares to the leader's and on how much risk you can stomach, not on a wish to make their returns bigger.
What happens if I set the multiplier too high?
Every copied trade becomes oversized for your account, so a normal losing streak from the leader can do far more damage than it would to them.
Does a lower multiplier make copying safe?
It reduces how much each trade risks, which lowers exposure, but it does not remove risk. The copied trades can still lose, just at a smaller scale.
Can I change the multiplier after I start copying?
Usually yes, and it then applies to new copied trades. Be aware it does not resize positions that are already open under the previous setting.
Trading involves substantial risk of loss. Historical and backtested results do not guarantee future performance. Read the full risk warning.