The A/D line is used to help assess price trends and potentially spot forthcoming reversals. If a security’s price is in a downtrend while the A/D line is in an uptrend, then the indicator shows there may be buying pressure and the security’s price may reverse to the upside. Conversely, if a security’s price is in an uptrend while the A/D line is in a downtrend, then the indicator shows there may be selling pressure, or higher distribution. This warns that the price may be due for a decline.