How to move the Vertical line simultaneously across all open chart

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How can I create and move a vertical line on all open charts simultaneously and corresponding to the same time?

In other words,

How can I program the vertical line to be created and moved across all visible charts by creating and moving it only on the active chart?



 
macpee: How can I program the vertical line to be created and moved across all visible charts by creating and moving it only on the active chart?

You program an indicator to monitor its location, remember it in a GV. The indicators on other charts see the updated location and moves theirs.

 
William Roeder:

You program an indicator to monitor its location, remember it in a GV. The indicators on other charts see the updated location and moves theirs.

Did you say indicator? I was thinking about Expert Advisor. What is GV please?

Ok, GV = Global Variable
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