What Is a Trade Copier? How Copying Trades Works

A trade copier is software that repeats the trades on one trading account onto one or more other accounts automatically. When a position opens or closes on the first account, the copier reproduces that action on the others within moments, so several accounts stay in step without you placing each trade by hand.

The same tool goes by several names. You will see it called an account copier, a trade duplicator or replicator, a multi-account copier, or simply a forex copier. They all describe the same mechanism: one account’s orders, repeated onto others. Trepeat calls each source→follower link a repeater, which is the same idea with a name that survives being said out loud.

The source → follower model

Every copier works on the same source → follower model: one account is the source, the account whose trades you want repeated, and the accounts that receive the copies are the followers. You connect them to the copier, point the followers at the source, and from then on the copier listens to the source and repeats each order onto the followers. The source can be traded however you like, by hand, or by an Expert Advisor. The copier just repeats whatever happens there. The steps it runs on every fill are set out in how a trade replication engine works.

What gets copied

A faithful copier repeats the whole life of a trade, not just the entry. It covers the open, the close, and a lot sized for each follower:

• Opens: a new position on the source opens a matching one on each follower.
• Closes: closing on the source closes the follower's position too (full or partial).
• Sizing: the follower's lot is sized by the rule you choose; equity ratio scales each follower to its own equity (more on that below).

Where a copier runs

A copier runs in one of three places: on your own PC, on a rented VPS, or in the cloud on the provider's servers. Because it only works while it's connected to the broker, the choice matters: each trades off uptime, cost and upkeep differently. We cover the full comparison in cloud vs local (VPS) trade copiers. On your own PC it is usually an EA installed in each terminal; see whether you need an MT4 copier plug-in.

Sizing: matching trades to each account

Copying a 1.0-lot trade straight onto a smaller account would over-expose it, so copiers scale the size to each follower, commonly by an equity ratio (each follower scaled by its own equity) or a fixed multiplier. How that arithmetic works, and how rounding and broker minimums come in, is covered in position sizing when copying trades; you can try it on the lot size calculator.

What a trade copier does not do

A copier is a distribution tool, not a strategy or an advisor. It doesn't decide what to trade, when, or whether a trade is a good idea. It only repeats decisions that already happened on the source. It's also distinct from social / copy-trading platforms, where you follow a stranger's signals: a trade copier repeats your own trades across accounts you control, not someone else's. The parts a copier is built from, and the path one fill takes through them, are in copy trading platform components and data flow.

Where Trepeat fits

Trepeat is a cloud trade copier for MetaTrader 4, MetaTrader 5, cTrader and TradeLocker demo accounts, the type prop-firm evaluation and funded accounts usually run on; live real-capital accounts aren't currently supported. You connect a source account once, add the follower accounts you own, and it repeats your trades across all of them in real time, sized by the rule you choose, where equity ratio scales each follower to its own equity, with no VPS to rent and no EA to install. Broker credentials are encrypted with authenticated encryption in a vault. It repeats the decisions you already make; it doesn't make them for you.

A copier repeats trades; it does not record why you took them. Keeping that record is a separate habit, covered in journaling copied trades.