Special EMA Crossover Indicator with alert needed

Quoting jeff75

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Hi all!
Is there an emas crossover indicator that allows trigger a sound alert only in one direction (upwards or downwards)? When there is a strong trend this would avoid getting too many signals.
Thank you in advance for your answer.

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Quoting jeff75

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Hi Cyber1 !
Thank you for your answer and sorry:I have expressed myself poorly.
It will be up to me to set if the trend is strong. I simply seek an indicator that can give sound signals only in a sense and not in both directions as is usually the case.In the indicator window it just needs to be this option: upwards or downwards , or something like that.

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