I don’t think there are any typical EA’s out there unless you’re...

I don’t think there are any typical EA’s out there unless you’re referring to EA’s giving trade alerts etc.

Most EA’s are used to help traders to place their orders based on their entry and exit conditions.

And imo if one was to use other’s EA it’s best to thoroughly understand their model, otherwise it’s no different than manual trading as I’d imagine the person would turn off the EA’s if they don’t see any positive expectancy.