IBM (3) Retracement levels

IBM (1h) retraced 0.382 ($ 169.58), calculated from "Minor"-wave 3! The other levels are the measured results from the "Minute"-wave a of this ZigZag correction pattern the stock is in. Minimum retracement for a wave "c" is 0.618 of wave "a" (identical with 0.382) or 1.000 ($ 166.10) or 1.618 ($ 160.00), although reaching the last level seems to be unrealistic. Wait till the price has touched the supprt-line at 1.000! (Nice opp. for conservative investors...)