MT4 vs MT5: Key Differences for Traders in 2025

Introduction

If you are a trader or developer in the MetaTrader ecosystem, the decision between MT4 and MT5 is one of the first and most important you will face. While both platforms share a familiar interface and core functionality, they are fundamentally different under the hood. MT4, released in 2005, was designed primarily for forex trading. MT5, released in 2010, is a multi-asset platform built for a broader range of markets including stocks, futures, and commodities. In 2025, both platforms are actively maintained by MetaQuotes, but their feature sets have diverged significantly.

This guide provides a comprehensive, hands-on comparison of MT4 vs MT5 differences covering order types, available timeframes, MQL language capabilities, backtesting engine performance, and supported asset classes. By the end, you will have a clear framework to choose the right platform for your trading style and development needs.

Prerequisites

Before diving into the comparison, ensure you have the following:

• MT4 and MT5 installed – Download both from your broker’s website or MetaQuotes. Install them in separate directories (e.g., C:\Program Files\MetaTrader 4 and C:\Program Files\MetaTrader 5).
• Demo accounts – Open a demo account on each platform from your broker or a free demo server (e.g., MetaQuotes-Demo). For MT5, ensure your broker supports multi-asset demo accounts; some brokers restrict MT5 demos to forex only.
• MetaEditor – Both platforms include MetaEditor (MQL4 IDE for MT4, MQL5 IDE for MT5). Open it from Tools > MetaQuotes Language Editor or press F4.
• Sample code files – Download the default MACD Sample.ex4 (MT4) and MACD Sample.ex5 (MT5) from the Navigator panel under Expert Advisors to test compilation and backtesting. If these are missing, reinstall the platform or download from the MetaQuotes website.
• Data for backtesting – Ensure you have at least 1 year of historical data for EURUSD and a stock symbol (e.g., AAPL if available) in MT5. Download from Tools > History Center or let the platform auto-download when you run a test.

Step-by-Step Comparison: MT4 vs MT5 Differences

This section walks through the key areas of difference, with exact steps to verify each feature on your own installations. Pay attention to the subtle implementation details that affect real-world trading and development.

1. Order Types and Execution

MT4 supports four order types: Market, Buy Limit, Sell Limit, Buy Stop, and Sell Stop. MT5 adds Buy Stop Limit and Sell Stop Limit orders, giving you more granular control. Additionally, MT5 introduces a Market Execution model with instant order filling, while MT4 relies on Instant Execution (requester fills at current price) or Request Execution (broker confirms).

To test order types:

1. Open a chart in MT4 (e.g., EURUSD, M5). Press F9 to open the order window. Note the dropdown under Type – you see only Market, Limit, and Stop options. The Execution mode is determined by your broker; you cannot change it manually.
2. In MT5, press F9 on the same symbol. The Type dropdown includes Market Execution, Pending Order (with Buy/Sell Limit, Buy/Sell Stop, Buy/Sell Stop Limit), and Immediate or Cancel. If your broker supports exchange trading, you may also see Exchange Execution.
3. For a hands-on difference: In MT5, try placing a Buy Stop Limit order. Enter a price above current market (trigger) and a second price (limit). MT4 cannot do this natively; you would need a custom EA to simulate it.

Edge case – hedging vs netting: MT4 supports hedging (multiple positions on the same symbol). MT5 uses netting by default (one position per symbol). If you need hedging in MT5, you must open separate accounts (sub-accounts) or use a broker that offers a hedging mode. Check your broker’s account settings in the terminal under Account History – if you see Netting displayed, hedging is not available.

Feature	MT4	MT5
Order Types	4 (Market, Limit, Stop)	6 (adds Stop Limit)
Execution Modes	Instant, Request	Market, Exchange, Instant, Request
Hedging	Supported (netting optional)	Netting only (hedging via separate accounts)
Market Depth	Not available	Available (Ctrl+U)

Key takeaway: If you need advanced pending orders (like Stop Limit) or trade on exchange-traded instruments, MT5 is the better choice. MT4 remains sufficient for standard forex hedging and simple order types.

2. Timeframes and Charting

MT4 offers 9 timeframes (M1, M5, M15, M30, H1, H4, D1, W1, MN). MT5 expands to 21 timeframes, including optional seconds-based frames (S1, S5, S10, S15, S30) and additional hours (H2, H3, H6, H8, H12). This is critical for scalpers and high-frequency strategies.

To verify:

1. Right-click on any chart in MT4 and select Timeframes – you see 9 options. The list is static; you cannot add custom timeframes without third-party tools.
2. In MT5, right-click and choose Timeframes – the list is much longer. Note the Period Converter indicator in MT5 (inserted via Insert > Indicators > Custom > Period Converter) that allows you to display custom timeframes not in the default list. For example, you can create an M3 chart by converting M1 data.

Practical tip: MT5’s extra timeframes are especially useful when backtesting strategies that rely on intra-hour data (e.g., M2 or M3). In MT4, you would need to manually convert tick data to achieve the same, which is error-prone and time-consuming. For scalpers trading on seconds-based frames, MT5 is the only viable option.

Troubleshooting – missing timeframes: If you do not see seconds-based timeframes in MT5, your broker may have disabled them. Check with your broker’s support or switch to a demo account on MetaQuotes-Demo which typically enables all timeframes.

3. MQL Language and Development

This is where the platforms diverge most significantly for developers. MT4 uses MQL4, a procedural language with limited object-oriented features. MT5 uses MQL5, a full-fledged object-oriented language with support for structures, classes, event handling, and advanced debugging.

Key MQL differences:

• Functions: MQL4 has OrderSend(), OrderSelect(), OrderClose() for trade operations. MQL5 uses PositionSelect(), OrderSend() with a MqlTradeRequest structure, and separate PositionClose() functions. The MQL5 model is more modular but requires learning the structure-based API.
• Event handling: MQL5 introduces OnChartEvent() for mouse clicks, keyboard events, and custom events. MQL4 has start() and init() only. This makes MQL5 much better for interactive indicators and trading panels.
• Compilation: MT4 compiles to .ex4 files; MT5 compiles to .ex5 files. They are not cross-compatible. You cannot run an MT4 EA on MT5 or vice versa without rewriting the code.
• Debugging: MT5 MetaEditor includes a built-in debugger with breakpoints, step-over, and variable inspection. MT4 has no debugger – you rely on Print() statements.

To test compilation:

1. Open MetaEditor in MT4 (F4). Create a new Expert Advisor via File > New > Expert Advisor. Write a simple script that prints "Hello MT4" in the start() function. Compile with F7. Check the Errors tab for any issues.
2. Repeat in MT5: create a new EA, but use the OnTick() event handler. Compile. Note the different file extensions (.ex4 vs .ex5). Also note that MT5 requires explicit #property declarations for EA properties (e.g., #property version "1.00").

// MQL4 Example
int start()
{
   Print("Hello MT4");
   return(0);
}

// MQL5 Example
#property version "1.00"
void OnTick()
{
   Print("Hello MT5");
}

Best practice: If you are new to programming, start with MQL4 for simplicity. If you plan to build complex multi-asset systems or need advanced debugging, invest time in MQL5. Many developers maintain both codebases by writing in MQL5 first and then porting to MQL4 with conditional compilation.

4. Strategy Tester and Backtesting

The Strategy Tester is a major differentiator. MT4’s tester supports single-threaded backtesting with 1-minute OHLC data as the finest granularity. MT5’s tester is multi-threaded and can use tick data (real or generated) for more accurate simulations, including multi-currency and multi-symbol backtesting.

To compare performance:

1. In MT4, open the Strategy Tester (Ctrl+R). Select the MACD Sample EA, symbol EURUSD, timeframe H1, date range last 6 months. Use Open prices only mode. Run and note the time. For a more accurate test, use Every tick mode – but note MT4 generates ticks from OHLC data, not real ticks.
2. In MT5, open the Tester (Ctrl+R). Select the same EA (if ported), same symbol and timeframe. Choose Every tick mode. Run. The test will be slower but more accurate. For a fair speed comparison, use 1 minute OHLC mode in MT5.
3. Multi-symbol test: In MT5, go to the Symbols tab in the Tester and add EURUSD, GBPUSD, and USDJPY. The EA must be coded to handle multiple symbols (using SymbolInfoDouble() calls). MT4 cannot run multi-symbol tests natively.

Backtesting Feature	MT4	MT5