This TradingView script is a modded version of the library called "VisibleChart" created by Pinecoder.
This version has the option for users to change the Fibonacci lines and price labels. This makes the script user-friendly.
Fibonacci extensions are a tool that traders can use to establish profit targets or estimate how far a price may travel after a retracement/pullback is finished. Extension levels are also possible areas where the price may reverse. This study automatically draws horizontal lines that are used to determine possible support and resistance levels.
It's designed to automatically plot Fibonacci retracement levels on chart, aiding in technical analysis for traders.
First, the highest and lowest bars on the chart are calculated. These values are used for Fibonacci extensions.
These values update as traders scroll or zoom their charts, this shows that it is a useful indicator that can dynamically calculate and draw visuals on visible bars only.