Average Rating is based on the momentum change of the itself. It is calculated by adding two values (the current value and a value n periods back), then dividing by two. This additional smoothing makes than the slightly less responsive than but helps to avoid noise.
( ) measures the presence of a downtrend and is part of the ( ). If is sloping upward, it's a sign that the price downtrend is getting stronger. The Positive Directional Indicator ( ) is a component of the ( ) and is used to measure the presence of an uptrend. When the is sloping upward, it is a signal that the uptrend is getting stronger. In general values above 20 are considered a trending environment above 30 is then a strong trend and above 50 is a very strong trend.