How to extend Fibonacci Retracement lines
Open the settings of the added tool in the "Style" tab, and check the "Extend lines left" to extend the tool lines to the left. Then, check the "Extend lines right" to extend the tool lines to the right.
Open the settings of the added tool in the "Style" tab, and check the "Extend lines left" to extend the tool lines to the left. Then, check the "Extend lines right" to extend the tool lines to the right.