http://bugs.winehq.org/show_bug.cgi?id=35906
--- Comment #13 from Ali Akcaagac aliakc@web.de --- Fedora 20 has released updated RPM's to Wine 1.7.16. So I can confirm, that the reported issues of MetaTrader not being able to start are gone. Either way it was either a MetaTrader issue (MT4 B:625+) or Wine 1.7.13 for Fedora 20 was errorous.
http://koji.fedoraproject.org/koji/buildinfo?buildID=509762