hi and welcome Panayiotis..
The Antichrist Orthodox Perspective
Compiled By Archimandrite Nektarios Serfes
Be careful as to where you read info regarding the Antichrist.
Also there are many prophecies from our Orthodox Father's and Saints that have written about the Antichrist...from early 3rd century to in our time.
Below are many prophecies relating to the end of times and the Antichrist...http://www.geocities.com/kitezhgrad/prophets/antichrist.html
The Day of the Last Judgment
Saint John of Shanghai & San Francisco... http://www.stmaryofegypt.org/library/st_john_maximovich/on_the_last_judgment.htm
Bishop Alexander (Mileant).....http://www.fatheralexander.org/booklets/english/revelat.htm
THE BOOK OF THE END
An Interpretation of the Apocalypse of St. John the Theologian
In Holy Scripture the term antichrist has a twofold meaning. In a broad and general sense this word indicates every person hostile to Christ's teaching (the Greek prefix anti- signifies against). This is the meaning St. John the Theologian used to speak of many antichrists in his epistles. In a particular sense the name Antichrist signifies a definite person — the leading adversary of Christ who is to appear before the end of the world. The appearance of this definite Antichrist on the world scene constitutes the final and decisive sign that the Second Coming of Christ is at hand.
Hope they help .