MetaTrader (MT4 and MT5)

What MetaTrader means

MetaTrader is a family of trading platforms made by MetaQuotes Software. The two main versions are MetaTrader 4 (MT4), released in the early 2000s, and MetaTrader 5 (MT5), its successor. Neither is a broker. They are software that brokers license and connect to their own servers, so the same platform can feel different from one broker to another depending on the instruments, spreads and rules the broker sets.

The platforms are especially common in forex and CFD trading. They offer charting with built-in indicators, multiple timeframes, order entry, an account history, and a scripting language for building custom indicators and automated programs known as expert advisors. They are available as desktop applications, mobile apps and web terminals.

MT4 became popular because it was stable, simple and easy to extend, and a large ecosystem of indicators, scripts and automated strategies grew around it. MT5 added more asset classes, more timeframes, a depth of market view and a stronger testing environment.

How it works

You open an account with a broker that supports MetaTrader, receive a login and server name, and connect the platform to that server. The broker's server feeds quotes to the platform and receives your orders.

Key parts of the interface include:

1. Market Watch, which lists symbols and live bid and ask prices.
2. Charts, with candlesticks, bars or lines and many indicators.
3. Navigator, where accounts, indicators, scripts and expert advisors are managed.
4. Terminal, where trades, history and account balance are shown.
5. Strategy Tester, used to run automated programs against historical data.

Automation works through programs written in MQL4 for MT4 and MQL5 for MT5. An expert advisor can open and close trades on rules you or a developer define. The platform runs it only while the terminal is connected, unless it is hosted on a virtual server.

One important difference is account type. MT4 traditionally uses a hedging model where you can hold opposite positions in the same symbol. MT5 can support netting or hedging, depending on what the broker enables.

A worked example

This example is illustrative. A trader uses MT4 on a demo account to test a moving average crossover idea on EUR/USD.

• They attach two moving averages to an hourly chart, 20 and 50 periods.
• They write down that a trade would open when the shorter line crosses above the longer one and close on the opposite cross.
• They open a 0.10 lot position by hand at 1.0800, which is a position of 10,000 euros.
• The price moves to 1.0830. The move is 30 pips, and at about 1 USD per pip for 0.10 lot the unrealised result is about 30 USD.

The same trader could automate the rule with an expert advisor and test it in the Strategy Tester. The test uses historical data and does not include every real-world effect, such as slippage and changing spreads, so results from it are only a rough guide.

Why it matters

The platform is the tool through which you place orders, so its features, reliability and execution quality shape your daily experience. MetaTrader's wide adoption means plentiful tutorials, third-party tools and the option to move between brokers without learning a new interface.

It also affects cost and options. Some brokers offer MT4 only, some MT5 only, and many offer both. Symbols, contract sizes and available markets may differ. MT5 often supports more asset classes, such as exchange-traded stocks, while MT4 is more limited in many broker setups.

Choosing a platform is a practical decision about charting, automation, device support and the instruments you want, rather than a question of one version being universally better.

How to use it in practice

1. Open a demo account first and explore Market Watch, charts and order tickets without risk.
2. Check which version, MT4 or MT5, your chosen broker supports and which account types use it.
3. Verify the symbol list, contract sizes and trading hours in the platform, not only on the website.
4. Set up chart templates and alerts to suit your timeframe.
5. If you use expert advisors or custom indicators, check the source and test them on demo before using real money.
6. Confirm how the platform handles stops, slippage and order types on your account.

Common mistakes and misconceptions

• Thinking MetaTrader is a broker or a regulator. It is software only.
• Believing an indicator or expert advisor from the internet is proven. Many are untested or misleading.
• Assuming backtest results will repeat live. Historical tests have limits.
• Assuming MT4 and MT5 are interchangeable. Programs written for one do not run on the other without conversion.
• Ignoring the broker's server and execution quality. Identical platforms can give different fills.
• Leaving automated programs unattended without limits on risk.

Risks and limitations

Automation does not remove market risk, and a faulty program can lose money quickly. Leveraged CFD and forex trading carries a high risk of rapid loss. Third-party add-ons can contain errors or malicious code. Connectivity problems, platform updates and broker rules can all disrupt trading. Regulations can also limit how automation is used in some regions.

How Brokeli looks at it

When we review brokers we note which platforms they provide, including MT4 and MT5, and what account and instrument options come with them. Platform availability is recorded in published research snapshots alongside fees and regulation, so you can compare like with like. We treat the platform as one part of the whole offering, not a reason to choose a firm on its own.