Have four charts open with different symbols and one DOM that could span the high of all four charts. Then the chart that is active would link to the DOM window
Add a symbol link that would link to the active window. If you select to link to the active window instead of one of the colors it would change the symbol to the current active window.
In settings application appearance visual style I have selected black under grid different colors I have subtle. I can see the change but it is not very noticeable. Is there a way to make it more noticeable for the active window.