Quick answer: For automated trading in 2026, MetaTrader 5 is the better choice for most people: it has a faster multi-threaded Strategy Tester, real tick backtesting, more markets and is the platform most brokers and developers now prioritize. MT4 EAs and MT5 EAs are not compatible.
Key takeaways
- MT4 and MT5 use different languages and files: .ex4 vs .ex5.
- MT5 backtests faster and can use real tick data.
- MT5 supports more asset classes and order types.
- Many brokers now push new clients toward MT5.
- An EA must match your platform.
Quick comparison
- Language: MT4 uses MQL4, MT5 uses MQL5.
- EA files: .ex4 for MT4, .ex5 for MT5. They don't run on each other.
- Strategy Tester: MT5 supports multi-currency, multi-threaded testing and real tick data.
- Markets: MT5 is built for forex plus stocks, futures and other instruments where the broker offers them.
- Timeframes: MT5 offers more timeframes.
- Position accounting: MT5 supports netting and hedging accounts depending on the broker.
Why MT5 matters for trading bots
Better testing means better decisions. The MT5 tester can model real ticks and run optimizations across CPU cores, which makes it easier to evaluate an Expert Advisor honestly. Read how to backtest in MT5.
When MT4 still shows up
Some traders keep MT4 because an old EA or indicator only exists there. If you depend on one, check whether an MT5 version exists before switching.
What this means when buying an EA
- Confirm the platform before you pay.
- Check that your broker offers MT5 accounts.
- Install on a demo MT5 account first. Here's how.
Remix Ai is built for MetaTrader 5 only.
Frequently asked questions
Can I run an MT4 EA on MT5?
No. The files and language are different. The EA must be rewritten for MT5.
Is MT5 harder to use than MT4?
The layout is similar. Most traders adjust within a few days.
Do all brokers offer MT5?
Many do, but not all. Check with your broker before buying an MT5 EA.
Is MT4 being discontinued?
MetaQuotes has focused development on MT5 and many brokers prioritize it for new accounts. Check your broker's plans.
Want to see an EA built around limits you control? Remix Ai is an Expert Advisor for MetaTrader 5 with lot size, session hours, drawdown and equity limits. Launch price $199, one-time payment.
Risk disclosure: this article is for education only and is not financial advice. Trading with automated software carries a high risk of loss, and past or simulated results do not predict future results. Remix Ai sells software. We do not manage accounts, offer copy trading or sell trading signals.