From the Abrahamic, to be more specific the Judeo-Christian worldview (without denying the other religions that claim to be Abrahamic), forbids astrology for the following:
-It is always related to worship of that which is not the True God who reveals Himself in many ways, enough for people to know about Him and how come before Him, the people of old and not that old who relate to that usually had a tendency to relate such acts with idolatry, or supernatural activity contrary to the character of God.
-It supposes a way of knowing the future, some cases the past, and other times thing regarding the present, the problem is that people who practice such never have 100% accuracy which put to doubt is veracity, just by thinking about it, why should I go with something uncertain, when the God of Abraham, Isaac, and Jacob already has all the fundamental answer for my life, He knows my past, is concern about my present conditions, and wants to guide and direct me looking forward for me to be with Him through Christ Jesus. The True God as revealed in the Scriptures (Bible) is the only One who knows everything from beginning to end and who will bring everything to its fulfillment.
-By divination regardless the way of practice that which is not been revealed is supposed, it becomes an object of manipulation, whether from person to person, or from demon to person, The Lord Christ is actually concern for the wellfare of His creatures, plus He came to destroy the deeds of the devil, that is why He opposed to it because people don't get in contact with the True God but rather with demonic forces.
-God revealed Himself in 3 definite ways: 1) Natural world, something exist, therefore a Creator must be; 2) Special revelation like prophecy, which inspired by God came to us in what is known as the Bible; 3) and ultimately through Jesus Christ who is the only revealer of God to humankind.
By prophecy in particular we don't mean divination, even by means of astrology, but rather a clear message from the God to the people, which is very sure to come to happen, because God cannot lie nor be mistaken.
To the satanist guy the reply I made should suffice but allow me to add: Neither because it work, nor because is hockey.. whatever, but actually because there is not real communication with the dead world, as with satanic forces in the worst case, why shall the living consult to the dead? plus Satan just came to steal, kill, destroy. on the other hand He who wants to consult come to the Lord the living God, Jesus also said that He came so we can have live, and live to the full, so I ask again why shall the living consult to the dead, when Jesus is alive and He bring live to us?
Thank you,