On EMAs

Pls, this EMA thing is still very confusing to me, honestly.
I have read a couple of materials on different strategies using EMAs of various types.
It only gets me more confused. Whats the relevance of the different Moving Averages and whats the rationale behind having so many different types?
I need someone who has a VERY SOUND UNDERSTANDING of the subject.

As for me, i have always traded, and have been lucky so far, with the NEWS, MACD divergence and similar indicators.

Anyone out there who reasons with me?

Many articles on the moving averages by using the search feature on this site.

Do a search on Bemac and read his MA posts. You'll get an idea of how they work.