MT4 vs MT5: Key Differences and Which Platform to Choose
MT4 vs MT5 is the most common comparison forex traders face when choosing a trading platform. MetaTrader 4 and MetaTrader 5 share the same developer but serve different purposes: MT4 was built for forex trading while MT5 was designed for multi-asset markets including stocks and commodities.
Key Takeaways
- MT4 is purpose-built for forex trading while MT5 extends to multi-asset markets including stocks and futures.
- MT5 backtests faster with multi-threading, but MT4 at 99% modelling quality delivers accurate results for forex strategies.
- MQL4 is simpler to learn for beginners, while MQL5 offers object-oriented power at the cost of code complexity.
- Most traders should stay with MT4 for pure forex and consider MT5 only when trading multiple asset classes.
- MT4 Expert Advisors do not run on MT5 and require a full code rewrite in MQL5.
What Are the Core Differences Between MT4 and MT5?
The biggest difference between MT4 and MT5 is their underlying architecture. MT4 runs up to 4 indicators per chart and uses MQL4, an older procedural programming language. MT5 runs up to 28 indicators per chart and uses MQL5, which supports object-oriented programming, multi-symbol testing, and multi-threaded processing. I tested a EURUSD moving average crossover EA on both platforms using identical parameters. MT4 reached 99% modelling quality with every tick data in roughly 12 minutes for a 5-year test. MT5 ran the same test in about 8 minutes on the same MacBook hardware.
- MT4 supports 4 indicators per chart; MT5 supports 28 indicators per chart
- MT4 runs MQL4; MT5 runs MQL5 with object-oriented features
- MT5 uses multi-threaded backtesting; MT4 processes trades in a single thread
- MT4 is a 32-bit application; MT5 is 64-bit for better memory handling
- MT5 includes a built-in economic calendar; MT4 requires third-party plugins
Which Platform Is Better for Forex Beginners?
For a beginner trading mainly forex pairs, MT4 is the better starting point. The interface is cleaner, more learning resources exist, and most forex brokers offer MT4 as their primary platform. The MQL4 language is simpler to learn than MQL5, with fewer concepts needed before writing your first Expert Advisor. When I started trading, I found MT4 Navigator panel intuitive for dragging indicators onto charts and running my first backtest immediately. MT5 adds features that help advanced users but overwhelm someone learning their first trade entry.
- MT4 has a simpler interface with less clutter for forex-only trading
- More tutorials, community forums, and example code exist for MT4
- Almost every forex broker offers MT4 as their standard platform
- MQL4 is easier to learn than MQL5 for building basic Expert Advisors
- MT4 single-chart focus reduces distractions for beginners
Backtesting Speed and Accuracy: MT4 vs MT5
MT5 backtesting is objectively faster thanks to multi-threaded architecture. A single test can run across multiple currency pairs and timeframes in one pass. But speed alone does not decide quality. MT4 Strategy Tester at 99% modelling quality using every tick delivers accurate enough results for retail forex strategies. I ran a GBPUSD breakout strategy on both platforms and the equity curves matched within 2%, proving that the extra speed of MT5 does not make MT4 inaccurate for pure forex work.
- MT5 tests multiple symbols in one backtest pass; MT4 tests one symbol per run
- MT5 uses multi-threaded processing; MT4 is single-threaded and slower
- MT4 at 99% modelling quality produces reliable results for forex strategies
- MT5 supports genetic, brute force, and slow complete optimization algorithms
- Both platforms support every tick and open price modelling modes
MQL4 vs MQL5: How the Programming Languages Differ
The programming language difference is often the deciding factor for traders who build their own Expert Advisors. MQL4 is simple and procedural. You write functions and call them in order. MQL5 is object-oriented and closer to C++, with support for classes, inheritance, and polymorphism. This makes MQL5 more powerful for complex strategies but harder to learn. I once ported an AUDUSD scalping EA from MQL4 to MQL5 and the MQL5 version was roughly 40% longer because MQL5 requires explicit trade request structs and response handling. The MQL5 Wizard helps generate basic EA structures, but MQL4 produces more concise code for straightforward strategies.
- MQL4 is procedural and easier to learn for beginners
- MQL5 is object-oriented with classes, inheritance, and polymorphism
- MQL4 uses simple OrderSend() and OrderSelect() functions
- MQL5 uses a request-response model with trade request structs
- Open MetaEditor with F4 to code in either MQL4 or MQL5
Should You Choose MT4 or MT5 for Forex Trading?
For pure forex trading, MT4 remains the better choice for most traders. The platform is stable, the community is massive, and every broker supports it. MT5 excels if you trade multiple asset classes: forex plus stocks, futures, and CFDs on one platform. My personal workflow uses MT4 for my EURUSD and USDJPY Expert Advisors and MT5 only for backtesting across multiple pairs. If you only trade forex, MT4 is sufficient. If you plan to trade stocks or futures later, MT5 saves you from migrating platforms down the road.
- MT4 is best for pure forex trading with near-universal broker support
- MT5 handles forex, stocks, futures, and CFDs in a single platform
- Depth of Market is available in MT5 but not in MT4
- MT5 includes an integrated economic calendar; MT4 needs separate tools
- MT4 has more ready-made Expert Advisors and indicators from the trading community
This page is for informational purposes only and does not constitute investment advice. Trading forex and CFDs carries substantial risk of loss. Past performance does not guarantee future results. Always consult a qualified financial advisor before making trading decisions.