1. Check that its not in your experts/indicators folder

2. Make sure you don't have an EA that's calling it on ANY charts

3. Make sure you don't have a template applied to any charts which uses the indicator

4. Very important - templates save not only indicator settings and colors but also objects and attached EAs. So if you saved a template from a chart that had and EA attached which called this indicator, it could be causing your problem.

Hope this helps, I'm don't have any experience with the WA indicators so I can't give you any more detailed information.

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