How do I enable / disable the currency / unit label on the price scale?

To configure the display mode of currency labels and units of measurement on your chart:

Open chart settings.
Go to the Scales and Lines tab in the menu that appears.
Find the Currency and Units menu item, where you can select the desired display mode.
Once you have selected, save your changes by clicking the OK button.

How can I merge all price scales into one on the left or…

Price bars have disappeared from the chart