But in all divination the spiritual readiness and sensitivity of the reader is paramount. It is questionable therefore that any truly gross and insensitive person will ever be really very good at Jyotish. I read on the one of the lists last night the account of one person witnessing a true Ayurvedic doctor diagnosing heart disease correctly by feeling the patients pulse and smelling the patients urine. The doctor, a person close to the Dalai Lama, prepared himself for the diagnosis encounter with two hours of Spiritual Practice including Bathing, Praying etc. This is typical amongst real practitioners.
Divinity is all powerful, and nothing is greater than it.
Then, you may be able to divine, with or without charts of Jyotish.