It is mentioned in the scriptures that Krishna is the all doer and not a blade of grass moves without His will. Srila Prabhupada has also said that Jiva has free will but it is extremely limited.
Even flaws are made blunt and the abode of Lord is attained by the mercy of Lord and His bonafide devotee.
In the Mahabharata, Grandsire Bhishma tells Yudhisthira Maharaj a story of a businessman named Manki who failed in all business despite of strong exertion. Later, he concluded saying that we all are completely controlled by the destiny.
In the Shrimad Bhagwatam, Srila Vyasa has foretold major political events which will occur in the Kali-Yuga. From the history books, we read that the words of Srila Vyasa proved to be true.
Vedic Astrology is an appendix to the Vedas. This science helps us to understand the time factor, which is an eternal instrument of Krishna, and make predictions. Parashar, father of Srila Vyasdeva, was also an astrologer who had written various books on astrology.
In the light of this, please share your views regarding extent of power of free will.