In short: an MT4 broker is a firm that gives clients access to the MetaTrader 4 platform, developed by MetaQuotes Software, to trade forex and contracts for difference (CFDs). The broker supplies pricing, order execution, account funding and client protections; MetaQuotes supplies the software. In the UK, the firm holding your account should be authorised and regulated by the Financial Conduct Authority (FCA), and eligible claims may be covered by the Financial Services Compensation Scheme (FSCS).
This article is for general information and education only. It does not constitute financial advice or a recommendation to trade with any particular provider.
MetaTrader 4, commonly called MT4, is a trading platform developed by MetaQuotes Software and released in 2005. Despite its age, it remains widely used in retail forex and CFD trading because of its stability, extensive customisation options and broad broker adoption.
The platform provides charting tools, technical indicators and automated trading through Expert Advisors (EAs), software written in the MQL4 programming language that analyse markets and execute trades. These features appeal to traders who want control over analysis and execution rather than relying entirely on a broker’s own interface.
UK traders also value practical details: multiple order types, simultaneous monitoring of many currency pairs, and strategy backtesting. Its long history means a large community shares custom indicators and troubleshooting guidance, although quality varies considerably.
Core MT4 features include:
Nine timeframes from one minute to monthly
30 built-in technical indicators
Support for custom indicators and scripts
One-click trading functionality
Market, limit, stop and trailing stop orders
Mobile applications for iOS and Android
The platform has limitations. MQL4 differs from the more modern MQL5, so code cannot simply be ported between them. MT4 was also designed primarily for forex rather than multi-asset trading, which affects how other instruments are displayed and managed.
UK clients can trade using MT4 via CMC Markets. For more information on how to do this, see here.
The FCA regulates financial services firms operating in the UK. When comparing MT4 brokers, FCA authorisation is a baseline filter rather than a mark of quality or a guarantee of outcomes.
FCA-authorised firms must meet capital adequacy requirements, keep client money segregated from company money and report to the regulator. These obligations exist to reduce harm if a firm gets into financial difficulty.
Be aware that some groups operate an FCA-authorised UK company alongside affiliated entities in other jurisdictions with different rules and protections. Confirm which legal entity would hold your account, and under which regulator, before depositing funds.
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Protection | What it means |
|---|
Client money segregation | Client funds are held separately from the firm’s operational money. |
FSCS protection | Eligible investment claims may be protected up to £85,000 per person, per firm if an authorised provider fails. FSCS does not cover poor trading performance or market losses. |
Negative balance protection | Retail clients should not lose more than the balance in the trading account on covered CFD positions. |
Leverage limits | Retail CFD leverage is capped according to the underlying asset and its volatility. |
Complaints route | Eligible complaints may be referred to the Financial Ombudsman Service after the firm’s complaints process. |
These protections apply to retail clients of the FCA-authorised entity. Clients categorised as professional, or clients of an offshore affiliate, may receive materially fewer protections.
Find the legal entity name and firm reference number in the website footer, terms or risk disclosure.
Search the FCA Financial Services Register by firm name or reference number.
Confirm the status is authorised, not simply registered or an unexpected appointed representative.
Check permissions cover the activities you intend to use, such as dealing in investments as principal.
Match the listed trading names, website addresses and contact details to the site you are using.
Confirm which group entity holds your account and money, especially if onboarding routes you offshore.
If details do not match, stop and contact the FCA before depositing.
Regulation establishes minimum standards. Beyond that threshold, MT4 brokers differ significantly in cost structures, available markets, execution characteristics and automation policies.
Trading costs accumulate in three main ways: spreads, commissions and overnight financing charges, often called swaps. Comparing one element in isolation produces misleading conclusions.
Spread-only pricing builds the broker’s revenue into the difference between the bid and ask price. Commission-based pricing typically shows tighter raw spreads but charges a separate fee per lot. Neither structure is inherently cheaper; the better option depends on your trade frequency, position size and holding period.
Cost comparison basics:
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Cost | How it works |
|---|
Spread | Applies on entry and exit; compare the typical and minimum spread for the instruments you trade. |
Commission | Usually charged per lot, per side or per round turn, often alongside tighter raw spreads. |
Overnight financing/swap | Applies to positions held overnight and varies by instrument and interest-rate differentials. |
Non-trading fees | May include deposits, withdrawals, currency conversion, inactivity, data or platform fees. |
Some firms advertise swap-free accounts, which may carry alternative charges or administration fees.
A practical method for calculating potential fees:
Take one instrument you wish to trade, in your preferred size, and model the full round-trip cost including a week of overnight financing. Then request the full fee schedule in writing.
MT4 originally served forex traders, and most MT4 brokers now also offer CFDs on indices, commodities, shares and, where permitted, cryptocurrencies for eligible clients.
Ranges vary substantially. One provider may list 50 currency pairs and another 80; one may offer CFDs on thousands of individual shares while another restricts equity exposure to major indices.
Focus on the markets you intend to trade rather than headline instrument counts. Access to exotic pairs matters little if you trade majors exclusively, but a narrow range becomes limiting if you later diversify.
Execution quality determines the price you actually receive versus the price you intended. Slippage, the difference between expected and executed prices, occurs during volatile conditions, around news events and at market opens.
MT4 supports different execution modes. Instant execution fills at the requested price or rejects the order if the price has moved. Market execution fills at the best available price, which may differ from the quoted rate.
No method eliminates slippage. What matters is consistent execution behaviour, transparent policies on requotes and gapping, and clear disclosure of how stop and limit orders are treated in fast markets. Guaranteed stop-loss orders, where offered, usually carry a premium.
Customisation is one of MT4’s main attractions. Traders can install custom indicators, save chart templates, set alerts and run Expert Advisors for automated strategies.
Brokers differ in how freely they permit this. Some restrict certain automated strategies, such as latency arbitrage or very high message rates. Others actively support algorithmic traders with hosting options or lower-latency connectivity.
If automation matters to you, confirm in advance:
Whether Expert Advisors are permitted without restriction, and which strategy types are prohibited
Whether a Virtual Private Server is offered, its monthly cost and any volume-based waiver
Where the trading servers are located, since physical distance affects latency
Whether historical tick data quality is sufficient for meaningful backtesting
VPS hosting and data subscriptions are recurring costs. Include them in your cost comparison rather than treating them as extras.
In short: MT4 suits traders focused on forex and CFDs who want the largest library of existing MQL4 indicators and Expert Advisors. MT5 suits traders who want more timeframes, more order types, an integrated economic calendar and broader multi-asset coverage.
Comparison of key differences:
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Feature | MT4 | MT5 |
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Timeframes | 9 | 21 |
Built-in indicators | 30 | 38 |
Programming language | MQL4 | MQL5 |
Order types | Core market and pending orders | Adds buy stop limit and sell stop limit orders |
Economic calendar | Requires an add-on or external source | Integrated economic calendar |
Position handling | Hedging | Hedging or netting, depending on account |
Instrument coverage | Primarily forex and CFDs | Broader multi-asset and exchange-traded support where broker-enabled |
MQL4 code cannot be ported directly to MQL5; strategies must be rewritten. Many brokers offer both platforms, so you can test each on demo before committing.
Leverage magnifies both gains and losses, so a small adverse price move can produce a loss much larger than expected relative to your margin. For example, at 30:1, a 1% adverse move equates to roughly a 30% loss against the margin committed.
Leverage is not borrowed cash in the traditional sense. It describes the relationship between your position size and the margin required to hold it. Higher leverage means a smaller margin requirement for the same exposure, not extra capital from the broker.
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Underlying | Retail cap | Indicative margin |
|---|
Major currency pairs | 30:1 | 3.33% |
Non-major currency pairs, gold and major indices | 20:1 | 5% |
Other commodities and non-major indices | 10:1 | 10% |
Individual equities | 5:1 | 20% |
Cryptoasset CFDs | Not available to UK retail clients | FCA ban on retail crypto-derivatives |
These are the FCA product-intervention caps for retail clients trading CFDs and rolling spot forex with FCA-regulated firms, as at the article review date. Check current FCA rules before publication.
Professional clients may access higher leverage after meeting eligibility criteria, but they forfeit certain retail protections, which can include negative balance protection, standardised risk warnings and, in some cases, access to the Financial Ombudsman Service. Reclassification is a significant decision, not an administrative upgrade.
Offshore firms outside FCA jurisdiction sometimes advertise far higher leverage. Those firms do not provide UK protections, and higher leverage increases the speed at which an account can be depleted during adverse moves.
Tax treatment is another difference between CFDs and spread betting for UK residents. Tax treatment depends on individual circumstances and can change.
A forex demo account is the most practical way to evaluate an MT4 broker before committing capital. Demo accounts simulate trading with virtual funds so you can assess platform behaviour, tools and support.
A structured demo test:
Open the demo with the same base currency and account type you intend to use live, ideally GBP if that is your funding currency.
Trade the instruments and sizes you actually plan to trade, not oversized positions.
Observe spread behaviour around London and New York stock market openings and during scheduled data releases.
Record execution speed, rejections and slippage against your intended prices.
Test charting, custom indicators and any Expert Advisor you plan to run.
Compare mobile app performance with the desktop terminal.
Contact support with a technical question and time the response.
Read the funding and withdrawal documentation before you fund anything.
Demo conditions may not replicate live execution. Servers, liquidity arrangements and fill behaviour can differ. Treat demo results as indicative only. Most demos also carry expiry periods or balance limits, so check whether they can be reset or extended.
Funding and withdrawals:
Which deposit methods are accepted, and are debit card and UK bank transfer supported?
Are there deposit, withdrawal or currency conversion fees?
How long do withdrawals take, and are there minimum amounts?
Can the account be denominated in GBP?
Account structure:
What account types exist and how do their costs differ?
Is there a minimum deposit?
What is the margin close-out process as the balance approaches the required margin?
Which legal entity holds the account, and is it FCA-authorised?
Support and service:
Platform specifics:
Are Expert Advisors permitted without restriction, and is a VPS available and at what cost?
How are maintenance windows and outages communicated?
In short, yes. The main risks include:
Market risk: Prices can move sharply or gap, so stop-loss orders may fill worse than requested.
Leverage risk: Small adverse moves can produce large percentage losses relative to margin.
Liquidity risk: Spreads widen and execution deteriorates around news, opens and thin conditions.
Counterparty risk: While FCA authorisation and FSCS eligibility reduce the risk of firm failure, they do not remove it.
Technology risk: Platform outages, connectivity failures and Expert Advisor malfunctions can prevent you from managing positions.
Behavioural risk: Overtrading and oversized positions remain a common cause of losses.
No strategy, indicator or platform feature removes these risks. The majority of retail investor accounts lose money when trading CFDs. You should not trade with money you cannot afford to lose.
Use regulation as your first filter. Confirm the company on the FCA Register, check its permissions and confirm which entity holds your money.
Compare total cost, not headline spreads. Model spreads, commissions, overnight financing, VPS and non-trading fees together for the instruments and holding periods you actually use.
Match markets, execution and automation policy to your strategy, then test on demo while treating those results as indicative.
Decide between MT4 and MT5 on your requirements for indicators, order types and multi-asset coverage, rather than just the version number.
Finally, remember that leverage limits and retail protections reduce risk but do not remove it. Position sizing and risk management remain your responsibility.
