One correct prediction means nothing
These days, every astrologer in India is doing research. He examines a few horoscopes and comes up with his own theory. That is why, predictions based on recent astrology books (based on so called research) rarely come true. So I suggest astrologers to make predictions using ancient books by Parashara and others. I have gone through many astrology books published before 1950's and I have never seen any relationship between gold prices and jupiter's Brihat Samhita does not come true all the time. According to Brihat Samhita, if a malific aspects or conjuncts the new moon, the prices of metals should fall. The saturn was conjucting the new moon (and sun) that occurred around Sept 18th. Commodities did not fall subsequently. However, I still trust Brihat Samhita because majority of times predictions based on it tend to come true. So forget about new research unless you are Parashara.