Tableau Tutorial - Split a bar into two colors using a parameter and reference line

What does the reference line tell us?

Hi Wes , Why exactly we need the dual axis , can't we do the same without the dual axis

Hi Weston, Is it possible to fill different colors above and below reference line for a single measure in a line chart?

Hey Wes, Is it possible to have many reference lines and different colors for each section! I have 3 reference lines in the data and I need to give different colors for a group of reference lines? I can't dual-axis after doing it once. Any workaround?? TIA.

Thank you!! I didn't expect that splitting a bar based on a parameter is that easy!