MT4 Copier Plug-In: Do You Need One to Copy Trades?

No. You only need an MT4 copier plug-in if you choose a copier that runs inside the MetaTrader terminal. A cloud trade copier connects to your MT4 account from its own servers, so there is nothing to install, no chart to attach anything to and no terminal to keep open.

Search for an MT4 trade copier and you'll find both kinds under the same name: a plug-in you install into the terminal, and a cloud copier that installs nothing. This guide explains each one, sets up the same job both ways, and says when the plug-in is still the better pick.

What is an MT4 copier plug-in?

In everyday use, an MT4 copier plug-in is an Expert Advisor (EA): a small program that runs inside the MetaTrader 4 terminal on a computer. One copy of it watches the source account and another places the same trades on each follower account.

Strictly speaking, a MetaTrader "plug-in" is something else: software a broker installs on its own trading server. A trader cannot install one of those. So when a product page says "MT4 copier plug-in", it almost always means an EA you add to your own terminal. For how an EA and a copier differ as ideas, see trade copier vs Expert Advisor.

How to install an MT4 trade copier plug-in

The details vary by product, but an installed copier is set up roughly like this:

1. Open one MT4 terminal for each account, usually all on the same computer.
2. In each terminal, open the data folder and put the copier's file in MQL4 → Experts, then restart the terminal.
3. Drag the EA onto a chart in every terminal and switch on automated trading.
4. Set one terminal to send (the source account) and the others to receive (the follower accounts).
5. Leave every terminal open and online for as long as you want trades copied.

That last step is the one you live with. It means:

• You install and update software on every machine running it.
• Copying stops if the PC sleeps, reboots, updates or drops its connection.
• To keep it always on, people rent a VPS and run the terminals there around the clock.

It works. The install and the always-on machine are the price.

How to copy MT4 trades without a plug-in

A cloud copier doesn't run inside your terminal at all. It connects to your account through the broker gateway, the same way a second terminal would sign in, and repeats your trades from its own servers. There's no file to download and no terminal to keep open. It runs whether your own devices are on or off.

The trade-off is that it holds the credentials it connects with, so its security posture matters: encryption at rest and isolated keys. That is covered further down.

A worked example: one MT4 account copied to two others

Say you trade one MT4 demo account and want every trade repeated on two more MT4 accounts, one of them at half the size.

With a plug-in, you run three terminals. You install the EA in all three, attach it to a chart in each, set one to send and two to receive, and enter a 0.5 lot multiplier on the second receiver. All three terminals then stay open on a PC or a VPS. If one closes, that account stops following.

With Trepeat, there are no terminals to run. The steps are:

1. Add each account with the three details your terminal uses: the account number, the trading password and the broker's server name. You also choose MT4 or MT5, name the account and confirm you own it. See connecting a MetaTrader account.
2. Create one repeater for each follower size. New repeater is a three-step form: a name and the source account, then the follower account, then sizing. Leave the first at the default 1× multiplier and set the second to 0.5×.
3. Press Run on each repeater. A new repeater is saved Stopped, so nothing is copied until you do. The badge moves from Starting to Syncing to Running, which commonly takes between thirty seconds and two minutes on a cold connection.
4. Place a trade on the source account. A 1.00 lot buy opens 1.00 lot on the first follower and 0.50 lot on the second, where the brokers define a lot the same way. Close it on the source and both copies close.

The full walk-through, with every default, is in your first repeater. The multiplier runs from 0.01× to 100×; the other sizing mode scales by each account's equity, which position sizing when copying trades explains.

Three things to know before you rely on it:

• Opens and closes are copied. Stop loss and take profit are not placed on the follower. The copy closes when the source position closes.
• Pending orders are not copied. When a limit or stop order fills on the source, that fill is copied as a market order.
• Only trades opened while the repeater is Running are copied. A position already open when you press Run is not repeated.

Can an MT4 plug-in copy to MT5 or cTrader?

Not on its own. An MT4 EA only runs in MT4. MetaTrader 5 uses a different program format, and cTrader is a separate platform with its own kind of add-on. To cross platforms with installed software you need a matching piece on each side, all running on a machine that stays on.

A cloud copier has no such limit, because nothing runs in any terminal. Trepeat copies between MT4, MT5 and cTrader in any direction: see the MT4 to MT5 trade copier, the MT4 to cTrader trade copier, and the guide to copying between MT4, MT5 and cTrader. Symbol names often differ between brokers, so check symbol mapping across brokers before the first trade.

Does a cloud copier need your MT4 password?

Yes. It has to place orders, so it needs the trading password. An investor password is read-only and cannot place a trade, so it is not enough. A plug-in in your own terminal never sends your password to a third party.

With Trepeat, the password is stored with authenticated encryption in a vault and is never shown again after you enter it. MetaApi, our connection provider for MetaTrader, also holds the login to keep the account connected. The connection can read your trades, positions and balance and place and close copied orders. It does not move money.

When is a plug-in the better choice?

• Everything is on one PC that is on anyway. If all your terminals run on a machine you keep on through your sessions, an installed copier does the job with no monthly fee beyond its licence.
• You don't want your password held anywhere else. An EA keeps it in your own terminal.
• You trade live real-money accounts. Trepeat currently connects demo-server accounts only, the type prop-firm evaluation and funded accounts usually run on.

A cloud copier is the better choice when you don't want a machine to look after: you trade from a phone, your PC is off for part of the day, or your accounts are on different platforms. The comparison with a local, EA-based copier goes through the same trade-off in more detail.

Do prop firms allow an MT4 copier plug-in or a cloud copier?

It depends on the firm, and only the firm's own rules can answer it. Some firms do not allow third-party copiers, a VPS or trades sent from a cloud server; others allow copying between your own accounts within limits. Check before you connect an account, whichever kind of copier you use.

Trepeat does not hide that a copier is in use. Its copies are labelled in the order comment and reach your broker from a data-centre address, not your own. What your prop firm sees sets that out, and prop-firm rules on copy trading lists the questions to ask.

So, do you need a plug-in?

Only if you choose the installed model. With a cloud copier the answer is no: no plug-in, no EA, no download, and no VPS to keep a terminal alive. For where the software runs, see cloud vs local (VPS).

• Nothing to install or update. There is no terminal add-on to maintain.
• Works when your PC is off. The copier does not run on your desk.
• No VPS bill. There is no terminal that needs an always-on machine.

Where Trepeat fits

Trepeat is the cloud model. You connect demo-server accounts you own on MetaTrader 4, MetaTrader 5, cTrader or TradeLocker, create a repeater, and press Run. From then on it repeats the trades you place on your source account onto your follower accounts, with no plug-in, no EA and no VPS. Live real-capital accounts aren't currently supported.

It costs $15 per account per month with every feature included, and the smallest subscription is 2 accounts, a source and a follower. The three accounts in the example above come to $45 a month. The free trial covers up to 3 accounts across cTrader and TradeLocker, in any mix, so you can copy between the two. MT4 and MT5 connect as soon as you subscribe. The MetaTrader 4 trade copier page has the rest. If you've only ever seen the install-an-EA kind of copier, this is the version with nothing to install.