Would you like help with specific MT4-to-MT5 conversion challenges or alternative MT5 tools?
I notice you're asking about using (MetaTrader 4 executables) in MT5 (MetaTrader 5).
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Experiencing a black screen or freeze in full-screen mode? Just click on the game screen to resume normal play. How To Use Ex4 File In Mt5
Try Refresh the page if you encounter black screen. Would you like help with specific MT4-to-MT5 conversion