Beginners tutorials for basic MQ4 scripts

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Hi all,

This is my first post and I hope that you MT experts can help me out here.

I would like to learn how to write simple MQ4 indicator scripts as a starting point to understand how to progress to writing more complicated scripts later.

For example, how would I program an indicator to audibly alert me that one type of moving average (eg. 8 SMA)has crossed another type of moving average (eg. 12 LWMA) OR for example another audible alert to inform me that price is moving in a different direction to the MACD direction.

I hope that I haven't overstepped the mark in asking for these types of examples.

Thanks,

Paul