I am surprised that no one have written a review on this important in astrology and prediction! You may ask me what is the key to predicting the future. Answer: Get this book and read youself! As a trader I use the knowledge in this book mainly to predict the price movement. So far, it was useful. I think that you may also employ it in other field. It is worth the effort to learn. But I need to deepen my understanding of the book. Hope that more of you will write a review and share your experience.