# Technical Studies Reference

### Bollinger Squeeze 3

This study calculates and displays a Bollinger Squeeze of the Third Type for the data specified by the Input Data Input.

Let $$X$$, $$n$$, $$v_{MA}$$, and $$v_{\sigma}$$ denote the Input Data, Study Length, Moving Average Multiplier, and Standard Deviation Multiplier Inputs, respectively.

This study displays two Subgraphs for $$t \geq 0$$: The Ratio and the Squeeze Indicator.

The Ratio at Index $$t$$ is denoted as $$R_t(X,n,n_{MA},n_{\sigma})$$, and we compute it in terms of the Standard Deviation and the Average True Range as follows.

$$\displaystyle{R_t(X,n,v_{MA},v_{\sigma}) = \frac{v_{\sigma}\cdot\sigma_t(X,n)}{v_{MA}\cdot ATR_t(n)}}$$

The moving average type for the Average True Range is controlled via the Moving Average Type for Calculation Input. By default, the Ratio is displayed as a bar graph.

• $$R_t(X,n,n_{MA},n_{\sigma}) \geq 1 \Rightarrow$$ Green
• $$R_t(X,n,n_{MA},n_{\sigma}) < 1 \Rightarrow$$ Red