A shadow, or a wick, is a line found on a candle in a candlestick chart that is used to indicate where the price of a stock has fluctuated relative to the opening and closing prices.

A trend line sat neatly across the top of the weeks ended April 13, 2012, May 4, 2012 and April 12, 2013. That set out a buy point near 740, a level the stock cracked in rising trade on May 9 and ...