Copier, Duplicator, Replicator: One Tool, Five Names
Copier, duplicator, replicator, account copier — the market has five words for one category of software. Here is what they all mean, what they do not, and what actually differs between products.
Updated 14 Oct 2026 · 5 min read
Copier, duplicator, replicator and account copier are four names for one category of software: a tool that repeats one trading account's orders onto other accounts. They are synonyms, and none of them is more correct than the others.
One of the phrases people actually type into Google is mt4 trade copier duplicator replicator — three different words for the same thing, stacked into one query, because the person searching isn't sure which word the industry uses. This page is the answer to that.
Define copier: one definition, several names
A copier is software that watches one trading account and repeats its orders onto one or more other accounts automatically. A position opens on the first account; within moments the copier places the matching order on the others. When that position closes, the copier closes its own. That single mechanism — one account's orders, repeated onto others — is what every one of these words describes.
The account being copied from is the source account. The accounts receiving the copies are the follower accounts. Every product in this category uses that shape, whatever it happens to call the two ends.
The vocabulary, side by side
Trade copier, account copier, trade duplicator and trade replicator are the same software under four names. A multi-account copier is that software with more than one follower account, and a repeater is Trepeat's word for one source account linked to its followers.
| Term | Where you see it | What it means |
|---|---|---|
| Trade copier | The most common term overall | Software that repeats one account's trades onto others |
| Account copier | MetaTrader account copier, MT4 account copier | Identical — the emphasis is on linking whole accounts rather than single trades |
| Trade duplicator | Older MT4 tools and forum threads | Identical — "duplicate" describes the copy of the order |
| Trade replicator | Vendor product names | Identical — "replicate" is the same copy in more formal language |
| Multi-account copier | Listings emphasising one-to-many | A copier with more than one follower account on the same source |
| Repeater | Trepeat's own term | One source account linked to one or more followers — a setting, not the software itself |
If a product page uses a word you haven't met, it is almost always one of these. Judge the tool by what it does with orders, not by the noun on its homepage.
What none of these words mean
None of these words means copy trading, signals or an Expert Advisor. The vocabulary problem runs the other way too: those three get filed under "copier" regularly and are not the same category at all:
- Copy trading and social trading — you pick a stranger from a platform's leaderboard and their orders are executed in your account. The trades originate with someone else. A copier repeats your own trades between accounts you already control, and has nobody to follow.
- Signals — someone publishes trade ideas and you place them yourself. A copier publishes nothing and receives nothing; it is not a signal service, and it never proposes a trade.
- An EA, robot or algo — an Expert Advisor decides what to trade from a strategy and creates the orders. A copier decides nothing and creates nothing; it repeats orders that already happened. Point a copier at an account an EA trades and it repeats that EA's orders — but the two jobs stay separate.
The full three-way split is in trade copier vs copy trading vs signals.
What to look for when choosing one
Six things differ between trade copiers, whatever each one is called: the platforms it connects, where it runs, its sizing rules, how it handles symbol names, what it will close, and which accounts and pricing it allows.
- Platforms, and which direction — MT4 only, MT4 and MT5, or cTrader as well. Some tools copy only between identical platforms; others go across. Check both ends, not just the source account.
- Where it runs — on your own PC, on a VPS you rent, or in the cloud on the provider's servers. This decides uptime and upkeep more than any other feature. See cloud vs local (VPS) trade copiers.
- Sizing rules — whether a follower can be sized from the ratio of account equities or only by a fixed multiplier, and whether the result is capped and snapped to the follower symbol's own volume step. See position sizing when copying trades.
- Symbol handling — brokers name the same instrument differently, so the tool needs a way to translate names and a way to exclude instruments you do not want repeated. See symbol mapping across brokers.
- What it will and will not close — ask whether the tool can identify its own positions. One that cannot may close a trade you placed by hand on the same account. See copying trades while still trading manually.
- Account types and pricing — which accounts are allowed to connect at all, and whether the charge is a flat monthly fee or scales with something you cannot predict in advance.
Where Trepeat fits
Trepeat is a cloud trade copier — an account copier, a duplicator, a replicator, whichever word you arrived with. It connects MetaTrader 4, MetaTrader 5 and cTrader and copies in any direction between them, including MetaTrader to cTrader and back. A repeater links one source account to one or more followers, with its own symbol allowlist, symbol remapping and sizing rule, and you Run or Stop each one on its own. To size two followers by different rules, put them in separate repeaters on the same source. Nothing installs on your machine and there is no VPS to rent.
Two limits, stated plainly. Trepeat currently connects demo accounts only: evaluation and funded accounts are supported on either platform — MetaTrader demo servers, or a cTrader demo account where the firm issues one — subject to that programme's own rules, and a live real-capital account is refused at connection. And no money moves through Trepeat — it holds no funds and takes no cut of anything you trade; the charge is a subscription of $15 per account per month. For the mechanism itself, start with what a trade copier is.