Copy Trading for Your Brokerage: Use Your Trading Platform's Built-in Feature, Add a Third-Party Module, or Build Your Own

Copy trading links a client's account to another trader's, so it opens and closes the same trades automatically. A broker can switch on the copy feature of its trading platform, license a module from another vendor, or build its own copy layer on the platform's server interfaces. Regulators in the EU and the UK have said that copying is portfolio management when it needs no action from the client before each trade. So the route you pick is also a licensing question.

What is copy trading, and how is each follower's trade size set?

The UK Financial Conduct Authority (FCA) describes copy trading as a service that “allows investors to trade by automatically copying another investor's trades”. The European Securities and Markets Authority (ESMA), the EU's securities regulator, calls the trader being copied the “copied trader”, “also identified as the ‘signal provider’”. This article calls that trader the leader and the client who copies them the follower. cTrader's pages say strategy provider and investor, and MetaTrader 5's say signals provider and subscriber. All sources in this article were opened on 6 November 2026.

A follower's account is usually smaller than the leader's, so each copied trade has to be resized. Vendors document three ways to do it:

• In proportion to the account. cTrader Copy uses the formula “Investor’s Equity / Strategy Provider’s Equity * Strategy Provider’s Volume”. Equity is the balance plus or minus the profit or loss on open positions. MetaTrader 5 uses the ratio of the two balances, scaled by the share of the balance the follower lets the copy use.
• A fixed multiplier. The leader's trade size is multiplied by a set number. Brokeree Solutions, a vendor of copy trading modules, lists this mode as “Multiply” in a general product brochure on its website (read on 6 November 2026).
• A fixed lot. A lot is the platform's standard trade size, and every copy opens at one set size. The same brochure says of this mode: “Copies’ volumes are always equal to the specified Copies’ volumes.”

Leverage, how large a position an account may open for each unit of its own money, can shrink the copy further. In MetaTrader 5's example, a leader with leverage of 1:100 opens 1 lot, and a follower with 1:10 “will open a deal of 0.1 lots”.

How is copy trading different from PAMM and MAM accounts?

PAMM and MAM accounts both let one trader manage many clients' money. Brokeree describes a PAMM account (percentage allocation management module) as a pool: “The trader uses a single master account to execute trades, and the system automatically distributes profits and losses among investors depending on how much each one contributed.” In MAM (multi-account manager), it says, “the trades are mirrored across individual client accounts”.

In copy trading, the leader trades their own account, and each follower picks a leader and can leave. The FCA notes that “The copying trader may disconnect their funds and manage their investments”. ESMA adds that leaders “in many cases, may also be clients of such investment firms”.

What are the three ways to offer copy trading?

• Use the built-in feature, such as MetaTrader 5 Signals or cTrader Copy. The platform maker matches leaders with followers and sets the rules you work within.
• Add a third-party module. A vendor's software runs next to your trading servers and gives your staff an admin panel for leaders, followers and fees.
• Build your own layer. Your team, or a firm you hire, writes the service that watches leader accounts and places follower orders through the platform's server interfaces.

What does the platform's built-in copy feature give us, and what do we give up?

MetaTrader 5. MetaQuotes says its Signals service “allows the automatic real-time copying of trading operations from one trading account to another”. Followers subscribe through an MQL5.community account, which MetaQuotes runs. Its rules say “The Signals Provider shall receive the payment less 20% commission”, which the service keeps. Copying runs on the follower's side, in their own MetaTrader 5 program, so “your trading account must always be on and connected to the server”. The rules read for this article describe no settings for brokers, so ask MetaQuotes which controls your server has. Also ask whether its ban on paid signals from a “representative, employee or affiliate of a brokerage company” covers your introducing brokers, the partners who bring you clients for a commission.

cTrader. Spotware, its maker, tells brokers that they “decide who can become a provider”. Strategies can be “visible only to their own clients or to all full members of cTrader Copy”. Its help centre says leaders' fees “are paid to the strategy provider in the form of a deposit from the broker”. Spotware says the broker earns on spreads, the gap between buy and sell prices, and on commissions from copied trades. Where jurisdiction and licence allow, the broker “may also participate in these fees”.

Match-Trader and DXtrade. A 2022 page from Match-Trade Technologies, the maker of Match-Trader, says “Copy Trading and Social Feed can be found in the main view”. In 2023 the company announced an integration with ZuluTrade, an outside social trading platform. Devexperts' 2024 press releases describe copy trading in DXtrade through two outside providers, Pelican and Traders Connect. A June 2026 release says Pelican's copy trading is available “from within the DXtrade platform”. On DXtrade, the built-in route and the module route almost merge.

This route has the fewest parts to run. It fits when most clients trade on one platform and you can live with the platform maker's rules for leaders, rankings and fees. cTrader Copy leaves more of those rules to the broker than Signals does.

When does a third-party copy trading module make sense?

Brokeree Solutions, one module vendor, says “Brokers implement copy trading by installing a specialized copy trading platform on their trading servers.” Its product page describes copying “across MT4, MT5 and cTrader” with fees set by the broker. These are the vendor's claims, so test them on your own servers.

A module fits when you run more than one platform, or want your own rules for who may lead and what leaders charge. The code stays the vendor's and runs inside your trading setup. Ask how it behaves when it restarts while followers have open trades, and how soon it supports each new version of your platform.

When is building our own copy trading layer worth it?

Building means writing the service that watches leader accounts, sizes each follower's order and places it. The same service brings both sides back in step after errors and calculates fees. On MetaTrader 5 it would run on the interfaces, or APIs, that MetaQuotes offers brokers. MetaQuotes says its “Server API can help you add more functions to MetaTrader 5 Trade Server”.

Build when copy trading is a product you sell and the products you tested cannot handle your leader rules or your compliance checks. The price is a team after launch. Every platform update can change the interfaces, and your layer sits in the path of every follower order. If nobody on your side can own that, start with a module.

What do we own on each route?

• Follower and leader records. On MetaTrader 5 Signals, the subscription lives in the follower's MQL5.community account, while the trades sit on your server. On cTrader Copy, each follower gets a copy-trading account on your server. With a module, get in writing that you can export every link between leader and follower, with dates.
• Rankings and who may lead. MetaQuotes ranks Signals providers. On cTrader Copy, Spotware says the broker decides who may lead and which strategies clients see. On the other routes both are yours, with the duties described below.
• Fees. MetaQuotes collects Signals subscriptions. On cTrader Copy, the broker pays the leader. On the other two routes, your firm runs the fee accounting.
• The cost of switching. Ask how followers, and each leader's history, would move to another system. Without an export, every follower subscribes again and every leader starts a new track record.

Why do followers' results differ from the leader's?

A follower's trade is a separate order, placed after the leader's. Spotware notes that the two parties' “prices may differ due to variations in trading conditions and execution time.” Vendors' documents name other causes:

• Trade size limits. MetaTrader 5 warns that mismatched minimum and maximum sizes can cause a “serious difference in volume”. In cTrader Copy, a trade below the minimum “will be adjusted to the step allowed by the broker”, and one above the maximum is not opened.
• Slippage, the gap between the price asked for and the price filled. A MetaTrader 5 follower sets a limit on it. If a copy meets a price beyond that limit and a retry with a wider limit also fails, “the accounts of the subscriber and provider become unsynchronized” until the platform tries again.
• Market hours and margin. cTrader Copy opens a trade in a closed market only when the market reopens. It skips trades when the follower's leverage is lower and margin, the money an account must set aside to hold open trades, runs short.
• Leader withdrawals. When a cTrader Copy leader withdraws money, “the platform automatically increases the investor's positions”.
• Stops at different brokers. A stop level closes a trade automatically at a set price. MetaTrader 5 says a follower's stop levels “may be triggered earlier” than the leader's. A copied position closed that way, or closed by the follower by hand, is opened again at the next synchronisation.

The documents say less about a leader in trouble. When a cTrader Copy leader stops a strategy, followers' open positions “will be automatically closed”. Both platforms let followers set an equity level at which copying stops. The pages read for this article do not say what followers see when the leader's account disconnects or is stopped out. A stop-out is when the broker closes an account's trades for lack of margin. Ask each vendor for a demo of both.

For the broker, one leader's order becomes many orders in the same direction at once. Spotware says its tools let brokers “monitor strategies, investor flow, and concentrations in real time”. That flow has to pass your risk limits and hedging rules like any other order flow. Two earlier articles cover both.

When do regulators treat copy trading as portfolio management or advice?

This section quotes regulators in the EU, the UK and Australia. Other countries have their own rules.

ESMA's Supervisory Briefing on copy trading, ESMA35-42-1428 of 30 March 2023, builds on a 2012 ESMA Q&A. It says a firm's automatic execution of a third party's trade signals “falls under the definition of portfolio management where the order execution is automatic and does not require any further action from the client.” If the client must act before each trade, the service may instead be investment advice, reception and transmission of orders, or execution of orders. A time limit to reject a trade, after which it goes ahead anyway, does not count as such action, and neither does “an ex-ante bulk approval (a blank check)”. The answer matters “to determine which authorisation the firm should obtain”.

For portfolio management or advice, ESMA expects firms to “select the copied traders”, evaluate their trading and limit it. Copied trades should stay within each client's mandate and suitability assessment, meaning the limits agreed with the client and the firm's check of what suits that client. One question it suggests supervisors ask is whether a firm has “the (IT) arrangements in place to ensure that unsuitable transactions are not automatically copied”. Commissions paid to leaders may count as inducements, payments that EU rules allow only under certain conditions. Where the pay rules of MiFID II, the EU's main law for investment firms, apply to leaders, ESMA asks whether their variable pay depends on the “Number and value of trades copied”. It also expects firms to check leaders' skill and experience.

The FCA's copy trading page says: “We classify copy trading as portfolio or investment management where no manual input is clear from the account holder.” For MiFID financial instruments, that “requires portfolio management authorisation from us”. Client settings such as “the sum they wish to invest or are prepared to lose” do not change this.

In Report 828, published in January 2026, the Australian Securities and Investments Commission (ASIC) counted 26,243 retail clients who used copy trading with CFD issuers in the 2023-24 financial year. CFD issuers are firms that offer contracts for difference. Of those clients, 66.53% made a loss. ASIC says it has “identified potential concerns relating to CFD issuers’ supervision and oversight of lead trader conduct, fee transparency and lead trader conflicts of interest”. It will engage issuers and other related providers on “our proposed regulatory response.”

ESMA says each business model should be assessed case by case. Ask a lawyer in every market where you take clients, before you launch and again before you change routes.

What should marketing and leader rankings show?

Leader rankings and profit charts show past performance. ESMA's briefing applies the MiFID II rule that information to clients “shall be fair, clear and not misleading”. It asks for “a fair and prominent indication of any relevant risks” next to any benefits. Past performance “should not be the most prominent element of the communication”. The figures should cover the preceding five years, or a shorter period for a younger service if based on complete 12-month periods. The firm should also explain how they were calculated. On a built-in feature, the platform maker designs the ranking screens your clients see. Have your compliance team review them as if they were your own marketing.

What does each route cost?

This article gives no prices of its own. The routes charge in different ways:

• Built-in feature: ask whether it comes with your platform licence or as a paid add-on. Leader fees carry the platform maker's cut. On 6 November 2026, MetaQuotes' rules paid providers “less 20% commission”. Spotware's help centre said “cTrader charges a 30% commission on all fees earned by the strategy provider from 4 July 2026 onward.”
• Third-party module: a setup or licence fee, a monthly fee, a revenue share, or a mix. The Brokeree pages read for this article showed no prices.
• Own build: the team that builds it and keeps it working through platform updates, plus the servers it runs on.
• Every route: legal advice in each market, and support staff who can explain why a follower's result differs from the leader's.

What should we ask a copy trading vendor or a firm that would build it?

• How is each follower's trade size calculated, and what happens below the minimum lot or above the maximum?
• What does a follower see when the leader is stopped out, or when the copy service restarts with trades open?
• How do leader and follower accounts get back in step after a rejected order, and where is each mismatch logged?
• Can the system stop a copied trade that falls outside a follower's mandate, and who sets those limits?
• How are leader fees calculated, and can our finance team recalculate a past month and get the same result?
• Can we export every leader, follower, link and fee record if we switch systems?
• Can you show this working on a server that runs today?

Where does amBrain fit?

amBrain publishes this blog. It describes one part of its trading work in one line: “amBrain builds algorithmic trading infrastructure: order execution, market data and pre-trade risk controls.” Another line on amBrain's website reads: “Trading terminal development, order management systems, and FIX protocol exchange integration.” Neither line names copy trading.

amBrain has been building software since 2019. On how it works with clients, it says: “Three formats: full delivery, a dedicated team, or engineers embedded in your team.” Its line on ownership is “The client keeps full ownership of the product and the code, except our reusable components.” Ask for the list of those components by name before you sign.

This article is not a case study and describes no client work. It does not say that amBrain has built, licensed or integrated a copy trading, social trading, PAMM or MAM system for any client. It quotes the published pages of ESMA, the FCA, ASIC, MetaQuotes, Spotware, Match-Trade Technologies, Devexperts and Brokeree Solutions. It claims no relationship between amBrain and any of these companies, recommends none of their products and gives no amBrain prices or timelines.

It is not legal or investment advice either. Check the rules that apply to your firm with a lawyer in each market where you take clients. If amBrain is on your shortlist, ask it the same questions as any other firm.