Can an MT4 Account Work on MT5 ?

No, you cannot use your MT4 account login detais to login to an MT5 terminal and vice versa.

When you opt to open an MT4 Account it means you want to use it to trade exclusively on the MT4 platform. If you want to trade on the MT5 platform then you must open an MT5 Account.

mt4 account is for mt4 trading terminal, and mt5 platform is for mt5 trading terminal. You cannot interchange because both terminals operate differently in terms of mechanics.

I think not, MT4 accounts cannot work on MT5

No, it cant. MT4 trading accounts are exclusive to the MT4 software.

No, MT4 accounts are limited to the MT4 software only. If you want to use the MT5 platform, then you must open an MT5 account. Let me digress a bit, the same goes for the TradingView platform, to use it you must open a TradingView or cTrader account type.

@yokoyi you mean cTrader accounts can work on TradingView?

Yes, brokers like Pepperstone, IC markets, FxPro; allow that configuration

MT4 accounts can only be used on the MT4 trading software. MT4 is being phased out so their users had better open MT5 accounts if they want to keep using MetaTrader

That's partially correct. MT4 accounts are indeed platform-specific and can't run on MT5.

However, MT4 isn't fully phased out yet, many brokers still support it actively. Best to check with your specific broker before switching.

No it cant and I suspect that was intentionally done by MetaTrader makers to force people to transition to MT5

its a NO please.

Different Servers: An MT4 account cannot connect to an MT5 server. Each trading account is hard-coded to its respective system.

Incompatible Account Numbers: MT4 and MT5 account numbers and passwords are created independently.

History and Data Loss: You cannot directly transfer your trading history or indicators from an MT4 account to an MT5 account