# Reversal Bars

Reversal bars is a volatility-based chart type that builds a new bars after the price passes a specified amount of ticks in the opposite (reversal) direction.

![](https://1574671354-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FQAglKSOJnxCrGxFyuplO%2Fuploads%2Fgit-blob-da43ebf3af7098b35815331b6880e98044acc3b2%2Fimage%20\(181\).png?alt=media)

## How do Reversal Bars is constructed?

There are two parameters that are involved in the calculations:

* **Length** is the minimum bar size after which a pullback can be counted.
* **Reversal Length** is the minimum size of pullback (reversal) after which the bar will be fixed and a new one starts to build.
