To learn about , check out the documentation: https://www.mesasoftware.com/papers/Usin...
Fisher has plenty of functionalities. Ribbons provides you with a view of consistency in price action. If all ribbons flip, generally this is a strong signal that the trend is changing. Fisher is extremely punctual (minimum input lag) and robust (doesn't miss movement). Look for everything, including divergences, trends, and Oversold, Overbought points.
Changing length will further provide you more sensitivity in overselling and buying, while numbing chop.
And for a single Fisher, check out HPotter's or LazyBear's implementation of the inverse of the Fisher, which has many other interesting properties .