Use a button on the screen to put an indicator on the chart

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I use a button to put Pivot Points on the chart. That works.

Now I want a button that puts a indicator on the chart.

Can anybody help?

Thanks 

 
  1. Do you see a function List of MQL4 Functions - MQL4 Reference that can do that?
  2. Best you can do is have the indicator put up the button (or have it check a Global Variable,) and draw or not.
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