Business and Personal Finance Dictionary

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• ADVANCE-DECLINE (A-D) LINE
  
  The advance-decline line graphs the ratio of stocks that have risen in value-the advancers-to stocks that have fallen in value-the decliners-over a particular trading period. The direction and steepness of the A-D line gives you a general idea of the direction of the market. For example, a noticeable upward trend, which is created when there are more advancers than decliners, indicates a growing market. A downward slope indicates a market in retreat. At times, however, there may be no clear trend in either direction.
  
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