Use the Legend to amend the indicator colors on a chart:
- Open the Legend
- Click the color block in front of the indicator
- Select a new color and click OK.
If you change the color format so that the background and indicator are the same color, the indicator will appear to be blank.
This is easily rectified by opening the Legend and amending the indicator color. The color block may be a bit hard to find -- just point your mouse to the normal position and look for the mouse-over hint.