CrossOver Moving Average Signal

Hello, I'm looking for a signal which can be edited (not too complex) using the Moving Exponential Averages Crossover method to determine trend changes on different times.

I'd like for it to be able to adapt to most timeframes, and be able to change the periods which determine the crossover.

I'd also like if it could send alerts and also email alerts.

Also I would like to keep in contact with the developer just in case any questions or problems arise.

Thank you for your time!