Acceleration/Deceleration (AC) is introduced by Bill Williams; it measures acceleration and deceleration of the current driving force.When the AC value of the current bar is greater than the previous bar value, the histogram bar is colored in green (and vice versa). According to Mr. Williams this indicator will change direction before any changes in the driving force, which will change its direction before the price.The only thing that needs to be done to control the market and make decisions is to watch for changes in color. To save yourself serious reflections, you must remember: you can not buy with the help of Acceleration/Deceleration, when the current column is colored red, and you can not sell, when the current column is colored green.

For more information contact us at http://www.blogger.com/www.sigmaforex.com