it is just DM+ minus DM -, and it is plotted as indicator. And i like to see different color on bar chart. So if the value of indicator is positive the bar is green or viceversa is red when the indicator is negative.
Try replacing the long dash in the script to a minus sign and see if that works (for some reason this can get reformatted so the software doesn’t recognise it as a valid symbol).
Have you watched any of the scripting tutorial videos? It will take you through the basics of creating a scripting formula and understanding how / where they can be used. Sign in here: