MT4 to MT5 · checked 29 September 2026
An account migration does not migrate an Expert Advisor. Check your broker's own notice, then preserve the editable source and define the behavior that must survive the move.
New MT4 orders stopped after the 25 September 2026 trading close. From 28 September, existing positions may only be closed on MT4. MT4 login and trading end after the 27 November trading close, for demo and live accounts.
Read OANDA Japan's notice ↗KCM Trade says its MT4 service ends after the 30 October 2026 market close. Check its later notices for account and position handling before making changes.
Read KCM Trade's notice ↗These dates concern the named broker routes. They do not mean MT4 is closing everywhere. Check the current notice for your own account.
Also check symbol names, volume steps, stop distance and server time. Matching chart markers alone do not prove matching order behavior or fills. OANDA Japan explicitly says MT4 EAs and indicators cannot run unchanged on MT5 in its transition schedule.
M179 covers one agreed behavior across platforms with documented differences and three parity checks. Start with your own editable source and a written rule. If you only have a purchased compiled EA, ask its seller for the source or a supported MT5 version. I will not reconstruct protected code or guess hidden logic. No migration can promise identical fills, returns or challenge outcomes.
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