Answer:
Short Interest and the Advance/Decline line
Step-by-step explanation:
The Short Interest and the advance/descent line, also known as the AD line, is an indicator of market amplitude that gives the same weight to all the values of an index or market. The advance/descent line, also known as the AD line, is an indicator of market breadth that gives the same weight to all the values of an index or market.
The advance / descent line is an indicator of market breadth because it informs us of the general market movement. Similarly, when we say that it gives the same weight to all stock index values, we are saying that for the forward / down line all values are equally important.
What really interests this indicator, being of market breadth, is to see if the price movement is accompanied by the movement of the indicator.