Advance/Decline Line - A/D

Definition of 'Advance/Decline Line - A/D'


A technical indicator that plots changes in the value of the advance-decline index over a certain time period. Each point on the chart is calculated by taking the difference between the number of advancing/declining issues and adding the result to the previous period's value, as shown by the following formula:

A/D Line = (# of Advancing Stocks - # of Declining Stocks) + Previous Period's A/D Line Value

Investopedia explains 'Advance/Decline Line - A/D'


This indicator is used by many traders to confirm the strength of a current trend and its likelihood of reversing. If the markets are up but the A/D line is sloping downwards, it's usually a sign that the markets are losing their breadth and may be setting up to head in the other direction. If the slope of the A/D line is up and the market is trending upward then the market is said to be healthy.



comments powered by Disqus
Hot Definitions
  1. Harvest Strategy

    A strategy in which investment in a particular line of business is reduced or eliminated because the revenue brought in by additional investment would not warrant the expense. A harvest strategy is employed when a line of business is considered to be a cash cow, meaning that the brand is mature and is unlikely to grow if more investment is added.
  2. Stop-Limit Order

    An order placed with a broker that combines the features of stop order with those of a limit order. A stop-limit order will be executed at a specified price (or better) after a given stop price has been reached. Once the stop price is reached, the stop-limit order becomes a limit order to buy (or sell) at the limit price or better.
  3. Pareto Principle

    A principle, named after economist Vilfredo Pareto, that specifies an unequal relationship between inputs and outputs. The principle states that, for many phenomena, 20% of invested input is responsible for 80% of the results obtained. Put another way, 80% of consequences stem from 20% of the causes.
  4. Pareto Principle

    A principle, named after economist Vilfredo Pareto, that specifies an unequal relationship between inputs and outputs. The principle states that, for many phenomena, 20% of invested input is responsible for 80% of the results obtained. Put another way, 80% of consequences stem from 20% of the causes.
  5. Budget Deficit

    A status of financial health in which expenditures exceed revenue. The term "budget deficit" is most commonly used to refer to government spending rather than business or individual spending. When referring to accrued federal government deficits, the term "national debt” is used.
  6. Floating Exchange Rate

    A country's exchange rate regime where its currency is set by the foreign-exchange market through supply and demand for that particular currency relative to other currencies. Thus, floating exchange rates change freely and are determined by trading in the forex market.
Trading Center