Pentecostal Orthodoxy.
PENTECOSTAL ORTHODOXY:
The Believers Eastern Church, have roots in Pentecostalism but have incorporated elements from Eastern Christian worship while retaining some Protestant principles -
The Eastern Orthodox church has a "spin" to almost deny the existence of an Orthodox Church that is Pentecostal, as they say it evolved by Pentecostals "incorporated elements from Eastern Christian worship while retaining some Protestant principles" but was never "an Eastern Orthodox Church that incorporated Pentecostal manifestations into it.
The reality is however many people in such Eastoern Orthodox Pentecostal style sects are formed from many individuals grouping together, the vast majority of whom might be former Orthodox believers, I am aware of no census to prove it either way.