MetaTrader 5 vs MetaTrader 4 — Which One Should You Use in 2026?

Пошаговая инструкция

1. Шаг 1: Understand the history

   MetaTrader 4 launched in 2005 and dominated retail forex through the mid-2010s. MetaTrader 5 launched in 2010 as a successor with multi-asset support (stocks, futures, crypto), a redesigned MQL5 language, and a faster backtester. MetaQuotes officially deprecated MT4 in 2018 and stopped issuing new MT4 broker licenses in 2022.

   Despite the deprecation, MT4 still has significant installed base — many older EAs, especially grid systems and martingales, were written exclusively for MT4 and never ported. About 40% of established offshore brokers still offer MT4 alongside MT5 in 2026.

   The practical implication: MT5 is the future, MT4 is the past, but the past is still trading. If you are starting fresh with no EA commitments, MT5 is the unambiguous choice. If you have inherited an MT4 setup, the migration cost has to be weighed against the platform benefits.

2. Шаг 2: Backtester differences (biggest practical reason for MT5)

   The Strategy Tester is where MT5 wins decisively. Key differences:

   MT4 Strategy Tester is single-threaded. Even on an 8-core machine, an MT4 optimization uses one core. A 1000-combination optimization takes 16 hours on MT4 on the same machine that finishes in 2 hours on MT5.

   MT5 supports 'Every Tick Based on Real Ticks' modelling — uses the broker's actual recorded tick history. MT4 only supports synthetic tick interpolation from M1 OHLC, which dramatically over-estimates scalping EA profitability.

   MT5 supports multi-symbol backtesting in a single run. MT4 backtests one symbol per run; for a basket EA you have to either backtest each symbol separately and combine in Excel, or use third-party tools like Tick Data Suite.

   MT5 Strategy Tester has built-in walk-forward analysis (Settings → Forward). MT4 has none — you simulate walk-forward by manually splitting date ranges.

   MT5 supports MQL5 Cloud Network for distributed optimization. MT4 does not.

   For any EA development work, MT5 is 10–50× faster end-to-end.

3. Шаг 3: Order type and execution differences

   MT4 supports: Buy/Sell market, Buy Stop, Buy Limit, Sell Stop, Sell Limit, plus Stop Loss and Take Profit attached to positions.

   MT5 adds: Buy/Sell Stop Limit (price hits stop, then becomes a limit order at a worse price — useful for capturing breakouts at the touch but only if liquidity is present), partial close (close part of a position; in MT4 you had to use the 'close by' workaround), and netting accounts (one position per symbol; in MT4 you always have hedging mode where each order is a separate position).

   The partial close feature alone changes how risk management code is written. In MT4 an EA that wants to take half profit must close the original position and re-open a smaller one — slow, costs spread twice. In MT5 it's a one-call partial close at the bid/ask.

   Netting vs Hedging accounts: in MT5 your broker chooses whether your account is netting (one position per symbol; new opposite orders reduce the existing position) or hedging (multiple positions per symbol allowed). Most retail forex brokers offer hedging by default for compatibility with MT4-style EAs. US-regulated brokers (NFA rule 2-43b) force netting.

4. Шаг 4: Programming language and EA portability

   MT4 uses MQL4. MT5 uses MQL5. Despite the name similarity, they are different languages — an MQL4 .ex4 file does not run on MT5, and an MQL5 .ex5 file does not run on MT4. EAs must be ported, not just recompiled.

   MQL5 is more like C++: object-oriented, strict typing, multiple inheritance, exception handling. MQL4 was C-like: structs only, weaker typing, no exceptions. The port from MQL4 to MQL5 is straightforward for simple EAs (1–2 days for an experienced dev) but can take weeks for complex EAs with custom indicators, multi-symbol logic, or DLL dependencies.

   This is why some vendor EAs remain MT4-only: the porting effort wasn't justified by the customer demand at the time. The list shrinks every year — most commercial EAs are now MT5-first or MT5-only.

5. Шаг 5: Depth of Market (Level II quotes)

   MT5 displays Depth of Market — the aggregated bid/ask ladder beyond the best bid/best ask — for any symbol the broker exposes. MT4 only shows top-of-book.

   For manual trading, DOM lets you see where the liquidity is stacked. For algorithmic trading, DOM gives an EA insight into market microstructure: thin liquidity often precedes fast moves; thick liquidity at round-number levels often pins price.

   Most retail forex brokers do not actually expose DOM even on MT5 — they aggregate liquidity provider quotes and only publish a synthetic top-of-book. Real DOM is available on ECN accounts at IC Markets, Pepperstone, Tickmill, and a few others. If DOM matters for your strategy, verify it's available on your broker before committing.

6. Шаг 6: Quick decision tree

   Use this checklist to pick:

   • Are you new to forex EAs? → MT5. No reason to start with deprecated tech.

   • Did you buy an EA that is MT4-only and the vendor doesn't ship an MT5 version? → MT4 for now, plan migration to a replacement EA within 12 months.

   • Do you trade scalping strategies? → MT5 (Every Real Ticks backtesting is essential; MT4 backtests for scalpers are unreliable).

   • Do you trade grid/martingale strategies? → Either works; check vendor preference.

   • Does your broker only support MT4? → Switch broker. MT5 has been the standard for 5+ years; brokers that haven't migrated are usually behind on other dimensions too.

   • Are you in the US (NFA-regulated)? → MT5 (most US brokers dropped MT4 for compliance reasons; the few that remain force netting accounts which break most MT4 EAs).

   • Are you on Mac? → MT5 (broker wrappers are MT5-only for newer macOS releases).

   When in doubt: install MT5 first, install MT4 alongside only if you have a specific MT4-only EA to run.

Типичные ошибки

• ✗ Buying an MT4-only EA in 2026 thinking 'it's cheaper'Решение: MT4-only vendors have abandoned ongoing development. The discount usually reflects no future updates, not bargain pricing.
• ✗ Trying to run an MT4 .ex4 on MT5 by renaming it to .ex5Решение: The files are different binary formats. Renaming does nothing. The EA must be re-ported by the vendor.
• ✗ Comparing MT4 and MT5 backtests as equivalentРешение: MT4 backtests use synthetic ticks that overestimate scalping EAs by 50–100%. MT5 Every-Real-Ticks results are closer to live.
• ✗ Choosing MT4 because 'more tutorials are written for it'Решение: MT5 documentation is mature in 2026. The tutorial-volume gap closed years ago. Pick MT5 for the engine, not the YouTube history.

Часто задаваемые вопросы