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The market level equal to a line connecting the two interim declines in a head and shoulders pattern.
In technical analysis, a line, sometimes with zero-slope and sometimes with slight slope, representing a buy point on a head and shoulders pattern. In a chart showing a head and shoulders pattern, the "head" and "shoulders" fall toward a certain near-horizontal line before rising again; this is the neckline. When technical analysts see a security falling toward the neckline, they view this as a buy signal because historical patterns have shown that the security's price will rise soon thereafter. However, if the security falls significantly below the neckline, technical analysts see this as a reversal of a previous trend.
The line that connects the two lowest points on the intermediate declines of a head-and-shoulders chart pattern. In an inverted head-and-shoulders formation, the neckline connects the two intermediate tops. If the second shoulder breaks through the neckline, it is an indication of a major price movement in the direction of the breakout.