MetaTrader 5 extends the MetaTrader family with multi-asset support and a more capable strategy tester. If you are choosing between MT4 and MT5, compare the broker’s available instruments and accounts with the tools or code you already use. This article explains the feature differences and the potential work involved in migration.

Which functions depend on the broker’s account?

MT5 offers a broader multi-asset architecture and strategy-testing toolkit. MT4 still receives maintenance releases: MetaQuotes’ release notes list an update in March 2026. Current documentation does not promise either platform’s update schedule five years ahead, so choose according to supported features and your broker’s offering.

MT5 supports OTC and exchange trading, including currencies, CFDs, stocks and futures where the broker and account permit them. A CFD named after a stock is not stock ownership, and an index symbol does not establish exchange futures execution. Read the product, contract size, volume step, trading session, costs and venue for the specific account rather than treating the platform icon as access to every market.

How much more does MT5 give you in day-to-day chart work?

MT5 has 21 standard chart timeframes compared with nine in MT4, including additional minute and hourly periods. More choices do not establish a strategy advantage. It also supports six basic pending types, including Buy Stop Limit and Sell Stop Limit, with availability and fill rules determined for the symbol. In a hypothetical OTC buy example, a stop at 1.1050 activates a Buy Limit at 1.1040. If price continues upward and never meets the limit’s execution conditions, a position need not open. Separate activation from a fill.

MT5 includes an economic calendar and Depth of Market; MT4 also has a DOM window. Exchange DOM data and OTC broker quotes have different meanings, and even exchange DOM availability depends on the provider. MQL5 economic-calendar functions use the trade server’s time zone rather than the user’s local time. Record that zone before comparing a release with another calendar or a Warsaw clock.

How do MQL5 and strategy testing beat MT4?

MT4 uses MQL4 and MT5 uses MQL5. Both support object-oriented constructs, including classes, inheritance and polymorphism. Their trading APIs and testing environments differ, so migrating an Expert Advisor requires reviewing its code. Language labels alone do not prove cleaner code or faster execution for every algorithm.

The MT5 tester can run an EA written to trade several symbols, with real-tick data where available, and distribute optimisation passes to local, remote or cloud agents. These are capabilities, not a promise that every test finishes in hours or reproduces live fills. A single test uses one agent; parallel optimisation tests different parameter sets. Record data coverage, modeling mode, costs and delay assumptions. Three independent final profits do not reproduce a shared portfolio’s sequence of equity, margin or limits. An honest strategy backtest needs compatible code and later validation as well as compute resources.

Illustrative example — backtesting a multi-pair strategy
Tasktest one system on EUR/USD, GBP/USD and USD/JPY
MT4standard test selects one symbol; do not sum independent results as a shared portfolio
MT5one compatible multi-currency EA; check each symbol’s history and selected mode
Optimisationparallel passes on supported agents; one agent per individual test

In netting, an oversized sale is not all a long closure

One sale can close existing exposure and create opposite exposure. Separate those portions when calculating realized P/L.

Scroll sideways to see the full diagram

A sale larger than the long reverses a netting positionFictional USD netting account: long 0.20 lot EUR/USD at 1.1000. One 0.30-lot sale filled at 1.1020 closes 0.20 lot for USD 40 profit and opens a 0.10-lot short at 1.1020. Contract size is EUR 100,000 per lot, with zero costs. We assign no profit to the new short.ONE FILL, TWO PARTSNetting: long 0.20 → sell 0.30 lotBefore: long 0.20 at 1.1000Sell 0.30 at 1.10200.20: close0.10: shortRealized P/L:+USD 40New position:short 0.10+40 applies only to the closed 0.20.No earlier profit belongs to the new short.

Fictional EUR/USD on a USD netting account: existing 0.20-lot long at 1.1000; one 0.30-lot sale at 1.1020. Contract size EUR 100,000 per lot, all costs zero. We model no subsequent rate or P/L for the new short. MetaTrader 5 — Basic Principles confirms that an opposing deal larger than a netting position reverses its direction. The new opening price here is the single reversing fill’s price. The opening-price definition is also described in MetaTrader 5 — Trading Operations: a single fill uses its price; multiple fills use a weighted price.

The 0.30-lot sale divides into closing 0.20 and opening a 0.10 short. This splits one fill’s volume, not two assumed fills at different prices.

Only the existing EUR 20,000 closes. The 0.0020 USD/EUR difference produces USD 40 realized P/L. The remaining EUR 10,000 creates a new short at 1.1020. Multiplying all EUR 30,000 by the old-entry difference gives USD 60, incorrectly assigning the new exposure a return from before it existed. Reconcile volume before and after the fill, then assign P/L to the closed portion.

What about account mode — hedging or netting?

MT5 supports netting and hedging, with the account model set by the broker. In a hypothetical full execution, a new 0.10-lot sale against an existing 0.30-lot long leaves a 0.20-lot long in netting. On a hedging account, opening that sale as a new position can instead retain the 0.30 long and add a separate 0.10 short. A partial closure of the specified long is a different instruction. The same signed net volume does not establish the same fees or margin. Check tickets and the accepted current protection levels; the order types explain the instructions.

In a separate fictional USD account, a 0.30-lot EUR/USD purchase fills as 0.10 lot at 1.1000 and 0.20 at 1.1010. Assume EUR 100,000 per lot, actual model fill prices and zero additional costs. The EUR 30,000 purchase costs USD 33,020, giving a volume-weighted entry of 1.100666…. Full closure at Bid 1.1020 gives USD 40 price P&L. Averaging the two row prices equally produces 1.100500 and a fictitious USD 45 result, overstating profit by USD 5. Group matching deals and weight by units; do not combine unrelated exits or reversals, or subtract spread again from actual fill-price P&L.

When does MT4 still make sense?

To be fair: MT5 does not win everything. The strongest argument for the fourth version is its back catalogue — over more than a decade the community wrote an enormous library of ready-made indicators and automated strategies in MQL4, and some brokers and forums still revolve mainly around MT4. If you have a specific, working Expert Advisor written for MQL4, porting it to MQL5 is not trivial: the event-handling functions changed, some predefined variables disappeared, and buffer indexing works differently. The MetaQuotes documentation describes this plainly as a migration process, not an automatic conversion. For someone with a large stock of old code, that is a real cost.

If you have no legacy code, compare the broker’s available products, account model and the tasks you will actually use. A faster backtest does not establish a faster live fill or remove trading costs. The MT4 vs MT5 in 2026 and cTrader versus MT5 comparison, within the wider platforms section, provide other points to check. A newer language or a larger menu is not by itself a reason every user should migrate.

What to do tomorrow

  1. On an available MT5 demo, check the symbol specification, account model and useful chart intervals. Find the calendar and record its time zone; a fixed hour of exploration does not prove mastery or a measured time saving.
  2. Test a multi-currency Expert Advisor that is explicitly written to access EUR/USD, GBP/USD and USD/JPY within one run. Running a single-pair moving-average strategy does not automatically turn it into a three-pair portfolio test. Check the selected data modes, each symbol’s history and the code’s trade logic.
  3. If you run an account with existing MQL4 strategies, before you move anything, write down a list of your indicators and Expert Advisors and estimate the cost of migrating them to MQL5 — only with that number in hand should you decide whether switching now pays off or whether it is better to wait.
  4. Confirm which hedging or netting accounts the provider actually offers before selecting one. Test a partial close and a new opposite instruction. If using a calendar filter, still check the release time, zone and current instructions: a high-impact label does not guarantee avoidance of exposure before a release such as the NFP report.