# Technical Studies Reference

### Accumulation / Distribution - Williams

This study computes the Accumulation/Distribution Index, which was created by Bill Williams.

Let the High Price, Low Price, Closing Price, and Volume at Index $$t$$ be denoted as $$H_t$$, $$L_t$$, $$C_t$$, and $$V_t$$, respectively. We denote the Accumulation / Distribution - Williams at Index $$t$$ as $$WAD_t$$, and we compute it for $$t \geq 1$$ as follows.

$$\displaystyle{WAD_t=\left\{ \begin{matrix} WAD_{t-1} + C_t - \min\{L_t, C_{t - 1}\} & C_t > C_{t - 1} \\ WAD_{t - 1} & C_t = C_{t - 1} \\ WAD_{t-1} + C_t - \max\{H_t, C_{t - 1}\} & C_t < C_{t - 1} \end{matrix}\right .}$$

Note: Accumulation / Distribution - Williams is initialized to $$0$$ at $$t = 0$$. This value is stored internally, but is not returned as output.

#### Inputs

• This study has no Inputs.