There is much speculation as to the origins of the symbol of the cross. Some say the vertical line indicates the concept of divinity while the horizontal line symbolizes the world; others suggest it divides the world into four elements or cardinal points.
There is a huge amount of information here:
http://www.christiansymbols.net/crosses_1.php
The sign of the cross.
There is nothing in the Bible to say a christian should do that, so I would say never.
There is nothing in the Bible that says a Christian has to make the sign of the cross. Making the sign of the cross is a man made tradition and has no Biblical basis or meaning. Additionally, some 'born again' Christians do make the sign of the cross.
Catholic Christian as he always sign of the cross
Holding up your sticks in the sign of the cross does not make you Christian.....
The sign of the cross as a ritual gesture is a later development in Christian tradition, not recorded as being practiced by the apostles in the New Testament. It became more prevalent in the early centuries of Christianity as a way for believers to express their faith.
The sign of the cross is a universal gesture used in many Christian traditions, so it does not have specific languages associated with it. However, the words spoken while making the sign of the cross can vary based on the language of the individual or the church they attend.
the cross is the symbol of Christian religion, recalling the crucifixion of Jesus Christ and the redeeming benefits of his passion and death. The cross is a sign of Christ himself and of the faith of Christians.
Pavel Datsyuk certainly appears to be a Christian. Between shifts he may be seen making the sign of the cross. The denomination is unclear.
He Christian Orthodox (He did the cross sign before the match he scored 3 goals for Juve)
depends what the christian sign is
Yes, Rajon is a Christian. He even does the cross sign whenever he makes a big basket.