Price and Time: Under this type of ABCD pattern the amount of distance and the time it takes for price to travel from A to B is equal to the time and distance from C to D Classic ABCD: In this pattern, the BC is a retracement of 61.8% – 78.6% of AB, with CD being the extension leg of 127.2% to 161.8% (equal in price distance) ABCD extension: CD leg is an extension of AB between 127.2% – 161.8%