One of the greatest technicians of all time was a man named W. D. Gann (1878-1955). He had tremendous success predicting market moves much in advance. Legend has it that he occasionally sent notes to The Wall Street Journal, which accurately predicted tops and bottoms in grain markets months ahead of time. There are two Gann principles that I have always respected. They are that historical prices alone aren’t predictive unless paired with time; and that the “birth dates” of contracts are of major significance. The birth date is the first day a contract, stock, or grain begins trading. And...