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 Investor/RT Tour ( more on Technical Indicators )
Accumulation/Distribution
The Formula . . . 

. . .more on Formulas 
SUM {[((CL - LO)-(HI - CL))/(HI - LO)] * VOL / DIVISOR}
 
The Presentation . . . 

. . . more on Charts 

Accumulation/Distribution

The blue line above, in the lower window pane of the chart, represents the Accumulation/Distribution Line based on Daily data for RNWK.  The Accumulation/Distribution line is seen overlaying volume bars.
 
The Preferences . . . 

. . . more on Preferences 

Accumulation Distribution Preferences

  • Volume Divisor (DIVISOR)- This divisor is used to keep the values of the technical indicator in a reasonable range for chart scaling purposes.  The volume will be divided by this number before being used in the formula.  If you would prefer not to use a divisor, simply enter a "1".

  • Line Color - This control allows you to choose the color and thickness of the line that represents the technical indicator in the chart.
 
The Description . . .
Accumulation/Distribution is a momentum indicator which takes into account changes in price and volume together. The idea is that a change in price coupled with an increase in volume may help to confirm market momentum in the direction of the price move.

Note the similarity of this formula to that of the stochastic; this is basically a stochastic multiplied by volume. This means that if the security closes near its high, the volume multiplier will have a greater effect than if the security closes nearer to its low.

If the Accumulation/Distribution indicator is moving up the buyers are driving the price move and the security is being accumulated. A decreasing A/D value implies that the sellers are driving the market and the security is being distributed. If divergence occurs between the Accumulation/Distribution indicator and the price of the security a change in price direction is probable.