MetaTrader 4 (MT4) is a free electronic trading platform developed by MetaQuotes Software in 2005, widely used by retail forex and CFD traders worldwide. It provides real-time price quotes, interactive charts with 30+ built-in technical indicators, multiple order types, and — most distinctively — a programming environment called MQL4 that allows traders to create automated trading strategies called Expert Advisors (EAs), custom indicators, and scripts. MT4 is available as a desktop application (Windows and Mac), a mobile app (iOS and Android), and a web-based platform. Despite being nearly 20 years old, it remains the most widely deployed retail forex trading platform globally due to its stability, ecosystem of third-party tools, and universal broker support.
Introduction: The Platform That Defined Retail Forex Trading
When retail forex trading exploded in the 2000s, a common problem emerged: traders needed a reliable, feature-rich platform that worked with their broker but was flexible enough to support analytical tools and automated strategies. Until 2005, most retail traders were forced to use browser-based platforms or simple desktop clients with minimal analytical capability.
MetaTrader 4 changed everything.
Launched by MetaQuotes Software in 2005, MT4 offered something previously unavailable to retail traders: a professional-grade charting and execution environment that also supported automated trading through its MQL4 programming language. For the first time, a retail trader could program a complete trading strategy, backtest it on historical data, and deploy it to trade automatically without writing a single line of code — if they used one of the thousands of freely available Expert Advisors.
By 2010, MT4 was the de facto standard for retail forex brokers. By 2025, despite being nearly two decades old and the existence of its successor MetaTrader 5, it remains the most widely deployed retail trading platform on earth.
This guide explains everything about MT4: what it is, what it does, its key features, its limitations, and who should use it.
What Is MT4? The Complete Overview
Technical Definition
MetaTrader 4 is a multi-asset electronic trading platform developed by MetaQuotes Software Corporation and first released on 1 July 2005. It is licensed to forex brokers who offer it to their clients as the primary trading interface.
MT4 is:
- Free for traders: Available at no cost through any broker that licences it
- Broker-hosted: Each broker runs their own MT4 server; the platform you download connects to your specific broker’s server for price feeds and order execution
- Multi-instrument: Supports forex pairs, CFDs on indices, commodities, metals, and other instruments as configured by the broker
- Programmable: The MQL4 language allows automated strategy development
How MT4 Works: The Architecture
MT4 operates on a client-server model:
- MetaQuotes develops and licenses the platform to brokers worldwide
- The broker runs an MT4 server that connects to liquidity providers and executes orders
- You download the MT4 client terminal (the application on your computer) from your broker
- The client connects to the broker’s server via the internet, receiving real-time price data and sending orders
This architecture means that while all MT4 installations look identical, each is connected to a specific broker’s trading infrastructure. An MT4 downloaded from Broker A cannot trade through Broker B — you need a separate installation with separate login credentials for each broker.
MT4 Key Features: A Complete Tour
1. Charting and Technical Analysis
MT4’s charting is the foundation of its appeal. The platform offers:
Nine timeframes: M1 (1-minute), M5, M15, M30, H1, H4, D1 (daily), W1 (weekly), MN (monthly). This covers the full spectrum of timeframes from scalping to position trading.
Three chart types: Line chart (close prices only), Bar chart (OHLC bars), Candlestick chart (Japanese candlesticks). The vast majority of traders use candlestick charts.
30+ built-in technical indicators: Including the most important analytical tools:
- Moving averages (SMA, EMA, WMA, DEMA, TEMA)
- MACD (Moving Average Convergence Divergence)
- RSI (Relative Strength Index)
- Bollinger Bands
- Stochastic Oscillator
- Average True Range (ATR)
- Ichimoku Cloud
- Parabolic SAR
- And many more
Drawing tools: Trend lines, horizontal lines, Fibonacci retracements and extensions, channels, rectangles, triangles, text annotations. All saved persistently on the chart.
Multiple chart windows: Open as many simultaneous charts as your computer can handle — a common professional setup uses 4-9 charts tiled across one or multiple monitors.
Templates: Save your entire chart setup (indicators, colours, timeframe, zoom level) as a template and apply it to any chart with one click — essential for maintaining consistent analysis environments.
2. Order Types
MT4 supports the full range of order types needed for professional trading:
Market orders: Execute immediately at the best available price.
Pending orders — four types:
- Buy Limit: Buy below the current price (buy on a pullback)
- Sell Limit: Sell above the current price (sell on a rally)
- Buy Stop: Buy above the current price (buy on a breakout)
- Sell Stop: Sell below the current price (sell on a breakdown)
Stop-Loss: Automatically closes a position at a specified adverse price level — the essential risk management tool.
Take-Profit: Automatically closes a position at a specified profit price level.
Trailing Stop: Automatically moves a stop-loss in the direction of a profitable trade, locking in gains as the trade advances.
One-click trading: MT4 supports one-click trading from the chart interface — a single click opens a position at the current market price with pre-configured lot size. Essential for scalpers and active day traders who need to enter and exit without confirmation dialogues.
3. Expert Advisors (EAs): Automated Trading
This is MT4’s most distinctive and influential feature. Expert Advisors (EAs) are automated trading programmes written in the MQL4 programming language that can:
- Monitor the market 24/7 and execute trades automatically based on defined rules
- Apply any trading logic that can be expressed in code — from simple moving average crossovers to complex multi-timeframe SMC analysis
- Manage open positions (moving stops, taking partials, trailing stops) automatically
- Backtest strategy performance on historical data through MT4’s Strategy Tester
- Send alerts (email, push notification) when conditions are met
Using EAs without programming: The vast majority of MT4 users who use EAs do not write them. The MQL5 marketplace contains thousands of free and commercial EAs covering virtually every imaginable strategy. Search, download, and attach to a chart — the EA runs automatically.
Key EA considerations:
- EAs only run when MT4 is open and connected to the broker’s server
- For EAs to run 24/7 without keeping your computer on, a VPS (Virtual Private Server) running MT4 in a datacenter is standard practice
- Always test EAs on a demo account thoroughly before live deployment
- Backtest using the MT4 Strategy Tester on historical data before live use
4. MQL4 Programming Environment
The MetaQuotes Language 4 (MQL4) is a C-like programming language built into MT4 for creating:
- Expert Advisors: Automated trading systems
- Custom indicators: Visual tools plotted on charts based on any calculation on price data
- Scripts: Single-execution programmes that perform specific tasks (closing all trades, calculating position size, etc.)
- Libraries: Shared code modules used by multiple programmes
MQL4 has a steep learning curve for non-programmers but is well-documented, has a large community, and thousands of examples are freely available. Traders with basic programming skills can typically create simple EAs within a few weeks of learning MQL4.
5. Strategy Tester: Backtesting EAs
MT4’s built-in Strategy Tester allows backtesting of EAs against historical data:
- Select the EA to test
- Choose the instrument and date range
- Select modelling quality (Every Tick for highest accuracy)
- Click Start — the tester runs through all historical data at any speed
- Review results: profit/loss, win rate, profit factor, drawdown, number of trades
This backtesting capability is fundamental to quantitative strategy development. No live capital is risked during backtesting; the tester produces a complete performance report of how the EA would have performed historically.
Important limitation: Backtests use historical data provided by the broker, which may have variable quality. For the most accurate results, use tick-level data from dedicated providers (Tickstory, Dukascopy) rather than the broker’s built-in data.
6. Market Watch and Symbol Manager
The Market Watch panel lists all available trading instruments with real-time bid/ask prices. You can:
- Right-click any symbol to open a chart, view instrument specifications (spreads, swaps, margin requirements), or open a new order
- Add or remove symbols from the Market Watch as needed
- View price history for any symbol
7. Terminal Panel: Trade and Account Management
The Terminal at the bottom of the MT4 window contains several critical tabs:
Trade tab: All open positions and pending orders with real-time profit/loss. Right-clicking any position provides options to modify (change stop-loss/take-profit), close, or reverse the position.
Account History: Record of all closed trades — essential for performance analysis and tax records.
Alerts: Set price or indicator value alerts that trigger sound, email, or push notifications.
Mailbox: Broker messages and notifications.
MT4 Mobile App
MT4 has native mobile apps for both iOS (iPhone/iPad) and Android devices.
Mobile capabilities:
- Real-time quotes and charts with indicators
- Full order management (open, modify, close positions and pending orders)
- Account monitoring and trade history
- Push notifications from desktop MT4 alerts (if configured)
Mobile limitations:
- Cannot run EAs (Expert Advisors only run on desktop or VPS)
- Fewer timeframes and indicators than desktop version
- Charting is adequate but not as deep as desktop for detailed technical analysis
Practical use: MT4 mobile is excellent for monitoring open positions, managing trades on the go, and executing trades away from the desktop. Most serious traders use desktop MT4 for analysis and setup, mobile for ongoing management.
MT4 WebTrader
MT4 WebTrader is a browser-based version of the platform that requires no download or installation.
Access: Available through your broker’s website — typically under “Trading Platforms” or “WebTrader.”
Capabilities: Real-time charts, order placement and management, basic indicators. Full MT4 functionality is not available — no EAs, fewer indicators, basic charting compared to desktop.
Best use case: Trading from a computer where you cannot install software (work computer, public terminal, borrowed device). Not recommended as a primary trading environment.
MT4 Limitations: What It Cannot Do
Despite its dominance, MT4 has genuine limitations:
Only 9 timeframes: MT4’s fixed timeframe selection (M1, M5, M15, M30, H1, H4, D1, W1, MN) means no M2, M3, M10, H2, or other custom timeframes. MT5 supports 21 timeframes including custom periods.
MQL4 only: EAs and indicators written for MT4 cannot be used directly in MT5 (though many are ported). MT4 cannot run MQL5 code.
No market depth (Level II): MT4 does not show order book depth — only the best bid/ask prices. Traders who use DOM (Depth of Market) analysis need MT5 or a different platform.
Limited multi-asset support: MT4 was designed primarily for forex. While brokers can offer stocks, futures, and crypto through MT4, the platform’s infrastructure is not as well-suited to these as MT5.
No built-in economic calendar: MT5 includes a native economic calendar; MT4 requires using an external calendar or an indicator/plugin.
Ageing architecture: MT4 is nearly 20 years old. While it remains fully functional, some modern features are difficult to implement cleanly in the older codebase.
Who Should Use MT4?
Ideal for:
- Forex and CFD traders whose strategy is built around MT4’s available timeframes
- Traders who use or plan to use Expert Advisors from the MQL5 marketplace
- Traders who have invested time learning MQL4 programming
- Anyone whose primary broker offers MT4 as their main platform
- Traders who value platform stability and a familiar, proven environment over cutting-edge features
Consider MT5 instead if:
- You need more than 9 timeframes
- You trade equity CFDs or futures where MT5’s multi-asset architecture is better suited
- You want a built-in economic calendar
- You want hedging and netting account types both available in one platform
- You are starting fresh with no existing MT4 EAs or workflow
Frequently Asked Questions (FAQ)
What is MetaTrader 4 used for?
MT4 is used primarily for forex and CFD trading. Traders use it to analyse markets through charts and indicators, place and manage trade orders, run automated trading systems (Expert Advisors), and backtest strategies on historical data. It is the most widely used retail forex trading platform globally.
Is MT4 free to use?
Yes — MT4 is completely free for traders. It is available as a free download through any broker that licences the platform. Brokers pay MetaQuotes for the server licence; traders access it at no cost.
Can I use MT4 without a broker?
No — MT4 requires a broker’s server to connect to for price data and order execution. You cannot use MT4 as a standalone analysis tool without a broker connection. You can use a free demo account from most brokers to access MT4 without real capital.
What is an Expert Advisor in MT4?
An Expert Advisor (EA) is an automated trading programme written in MQL4 that runs inside MT4 and can automatically analyse the market, generate trade signals, and execute orders without manual intervention. EAs enable algorithmic trading for retail traders.
Is MT4 still the best forex platform in 2025?
MT4 remains the most widely used retail forex platform by sheer number of brokers and users. It is not the most feature-rich (MT5 has more), but its stability, ecosystem of third-party tools, and universal broker compatibility make it the most practical choice for many traders — particularly those already invested in MT4 EAs and workflows.
How do I download MT4?
Download MT4 directly from your broker’s website under their “Trading Platforms” section. Each broker provides a customised MT4 client that connects to their servers. Do not download MT4 from unofficial sources.
Conclusion
MetaTrader 4’s two-decade dominance of retail forex trading is not an accident of marketing or inertia — it reflects genuine functional excellence. The combination of professional-grade charting, comprehensive order types, a powerful programming environment, and universal broker support created a platform that meets the needs of traders from complete beginners to sophisticated algorithmic developers.
Its limitations are real: the fixed 9 timeframes, MQL4-only programming, lack of Level II data, and ageing architecture are genuine constraints. But for the vast majority of forex and CFD traders whose strategies fit within these parameters, MT4 remains a fully professional and highly capable trading environment.
Learn MT4 well, build your workflow around its capabilities, and leverage the enormous ecosystem of freely available indicators and EAs. The investment in learning this platform pays dividends across the hundreds or thousands of trading hours you will spend in it.
Disclaimer: This article is for informational and educational purposes only and does not constitute financial or investment advice. Trading involves significant risk. Always conduct your own research and consult a qualified professional before trading.
