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MT4 vs MT5 on a VPS in 2026: Should You Still Be Running MetaTrader 4?

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MT4 vs MT5 on a VPS in 2026: Should You Still Be Running MetaTrader 4?

MetaTrader 4 was released in 2005. By software standards it is ancient, and yet it still runs on a large share of retail trading VPSs. The EAs work, the indicators work, and “if it isn’t broken, don’t fix it” is a reasonable instinct when real money is involved.

But the ground under MT4 has been shifting for years. MetaQuotes stopped selling new MT4 licences to brokers in 2018 and has pushed the industry towards MetaTrader 5 ever since. Every year a few more broker account types, prop firm programmes and new instruments are MT5-only.

This is not a “MT5 is better, switch now” article. It is a practical look at what each platform means on a VPS, and how to tell whether your setup should move, and when.

📊 Key Stat: MT4 is a 32-bit application. MT5 is 64-bit. On a VPS that difference affects how much memory a single terminal can use, how the Strategy Tester scales across CPU cores, and how both platforms will age as Windows and brokers move on.

The Differences That Matter on a VPS

Most MT4 vs MT5 comparisons list features: more timeframes, more order types, built-in economic calendar, depth of market. Those are real, but the differences that affect a VPS setup are narrower.

Memory and the 32-Bit Ceiling

As a 32-bit process, each MT4 terminal can address only a limited amount of memory, no matter how much RAM the VPS has. A single MT4 terminal with long chart histories and heavy indicators can hit that ceiling and become unstable while the VPS still shows free RAM. The usual fix is to spread the load across more terminals.

MT5, as a 64-bit application, doesn’t have that ceiling. It is generally heavier per terminal, though, especially with many symbols in Market Watch and deep history. Our RAM sizing guide has typical numbers for both.

What it means for your VPS: Many light MT4 terminals pack efficiently onto a small plan. A few MT5 terminals doing heavier work benefit more from RAM headroom. See how many MT4 terminals can I run on my VPS for the arithmetic.

The Strategy Tester Uses Your CPU Differently

MT4’s Strategy Tester runs an optimisation on a single core. MT5’s tester is multi-threaded. It spawns testing agents across every available core and can also test on real tick data. On a multi-core VPS, an MT5 optimisation can finish several times faster than the same job in MT4.

What it means for your VPS: If you optimise on the VPS, MT5 is where extra vCPUs pay off. The catch is that the tester will happily use every core, including the ones your live EAs need. Our Strategy Tester optimisation guide covers how to limit it.

Hedging vs Netting

Early MT5 only supported netting: one position per symbol, with new orders adding to or reducing it. That alone kept many forex traders on MT4 for years. MT5 has supported a hedging account mode since 2016, and most forex brokers offer it. But an MT5 account can be either mode, and an EA written for one can misbehave on the other.

What it means for you: Before you migrate a hedging-style EA (grids, baskets, independent long and short positions), confirm the MT5 account is in hedging mode.

MQL4 Code Doesn’t Run on MT5

This is the big one. An .ex4 EA will not load in MT5, and MQL5 is a different enough language that porting means rewriting, not recompiling. Order handling in particular works differently.

What it means for you: Migration is a project, not a setting. If your EA is commercial, ask the vendor whether an MT5 version exists. If it is custom, budget time for a port and a fresh round of testing.

⚠️ Warning: A ported EA is a new EA. Even a careful MQL4→MQL5 conversion changes how orders, fills and positions are handled. Run it on demo, or in parallel at minimum size, before trusting it with the account the MT4 version used to trade.

Reasons to Stay on MT4 (For Now)

  • Your EA is MT4-only and the vendor has no MT5 version. This is the most common reason, and a valid one.
  • Your broker account is working and MT4 is still supported for it. A stable setup has value.
  • Your indicators and tools are MQL4-only, such as custom indicators, trade copiers or utilities without MT5 equivalents.
  • You run many lightweight terminals. Packing many small MT4 terminals onto a modest VPS is efficient.

Reasons to Move to MT5

  • New accounts, new brokers and prop firms. A growing share of broker account types and prop firm programmes are MT5-only, or offer MT4 only for existing clients. See MT5 setup and optimisation on a VPS for the platform side.
  • Instruments. Exchange-traded futures and stocks, and a broader CFD range, are often MT5-only at the same broker.
  • Optimisation workloads. Multi-core testing and real-tick backtests matter if you develop strategies on the VPS.
  • Longevity. Every year MT4 stays in service it is further from where MetaQuotes is investing. Migrating on your own schedule beats migrating because a broker gave you 30 days’ notice.

💡 Tip: You don’t have to choose all at once. MT4 and MT5 install side by side on the same Windows VPS without conflict. Run your proven MT4 EA live while testing its MT5 port on a demo account on the same machine. Both terminals are then fed from the same datacenter, so the comparison is fair.

A Low-Risk Migration Path on a VPS

  1. Inventory. List every EA, indicator, script and utility on each MT4 terminal. Note which have MT5 versions.
  2. Size up. If you’ll run MT4 and MT5 side by side for a while, you need headroom for both. A Pro plan ($39/mo, 4GB RAM, 2 vCPUs) is a comfortable size for a parallel run. Heavier multi-terminal setups belong on Scaling ($79/mo, 8GB RAM, 4 vCPUs). See pricing.
  3. Open a matching MT5 demo at the same broker, in hedging mode if your strategy needs it.
  4. Install MT5 from your broker’s download, not the generic installer, so the server list is correct.
  5. Run in parallel. Let the MT5 version trade demo while MT4 trades live. Compare signals, entries and exits over a couple of weeks, including at least one high-impact news week.
  6. Check the plumbing. Symbol names, filling modes, stops levels and volume steps can all differ between MT4 and MT5 accounts, even at the same broker. The trade error codes guide lists the errors that show up when they do.
  7. Cut over deliberately. Disable the MT4 EA before enabling the MT5 one on live. Never run both against positions on the same account.
  8. Keep the MT4 terminal installed but idle for a while as a fallback.

✅ Best Practice: Set up MT5 auto-start the same way as MT4, with a Startup folder shortcut and AutoTrading enabled, and test it with a deliberate VPS reboot before you go live. The MT4 automatic startup guide applies almost word for word.

🚀 Try FXVPS for $2.99. Get 7 days on a VPS trial with room to run MT4 live and MT5 on demo side by side, and cancel anytime.

What About cTrader and the Others?

If you’re migrating anyway, it’s fair to ask whether MT5 is the right destination. For C# developers and traders who want a more modern interface, cTrader is a strong alternative. We compare the two in MT5 vs cTrader on a VPS. Prop-firm-oriented platforms such as DXtrade, Match-Trader and TradeLocker are covered in our DXtrade, Match-Trader and TradeLocker guide. For most EA traders with existing MQL code, though, MT5 is the shortest path.

Frequently Asked Questions

Is MT4 being discontinued?

MetaQuotes stopped selling new MT4 licences to brokers in 2018, but existing brokers continue to run MT4 and it still receives builds. What varies is each broker’s policy. Some still open new MT4 accounts, while others offer MT5 only for new clients. Check with your broker.

Can I run MT4 and MT5 on the same VPS?

Yes. They install into separate folders and run side by side without conflict. Just make sure the VPS has enough RAM for both.

Will my MT4 EA work in MT5?

No. MT4 EAs (.ex4) do not load in MT5. They need to be rewritten in MQL5, or you need an MT5 version from the vendor.

Does MT5 need a bigger VPS than MT4?

Per terminal, MT5 usually uses more memory, and its Strategy Tester will use every core you give it. For live trading only, the difference is modest. For optimisation work, more vCPUs make a real difference.

Is MT5 execution faster than MT4?

Execution speed mostly depends on the network path to the broker’s server and the broker’s own infrastructure, not the platform. A VPS near the server matters far more than which platform you run.