Generally, broker that provides data for Metatrader can set its server time zone to any value. Sometimes it's a local time of target auditorium or GMT+2 so trading day ends when NYSE closes (17:00 EST, 00:00 broker TZ) .


Graphic Ephemerides date axis mark-up is Greenwich time, so to synchronize them user must set time zone accordingly.
You may do this on Preferences->Fin.Data tab.