How can my EA determine if a certain indicator is installed on the chart?

 

Let's say the indicator is named "ABC_ABC".

What Expert Advisor code will test to see that the indicator "ABC_ABC" is really installed on the chart?

NOTE Maybe I could put some kind of special question/response code into my custom indicator -- but I'm not sure what that code would look like.

Thanks in advance for your help. Have some fun today.

 

It isn't necessary for EA to have an indicator on a chart. It is enough to have it in "Indicator" folder.

 
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