I need help with my first EA!

I have been looking all over for some info on programming mt4 but I have not found what I am looking for. Basically, I want my EA to do this:

When indicator goes from below # to above # buy.
When indicator goes from above # to below # close the previous buy.
When indicator goes from above -# to below -# sell.
When indicator goes from below -# to above -# close the previous sell.

I am not asking anybody to do this for me, but I have not found anything on the web that explicitly says how to do stuff like this. My indicator is a custom indicator also, I don't know if that changes anything.

Also, what is supposed to go in the init and deinit in the EA?

I appreciate any advice or bits of code or anything.

Thanks,
andersenws

Use magic number for the trade you opened, then you can close that particular trade including the magic number of the trade.
There is also a function that can open an opposite trade when closing one, I don't remember exactly now, but if you look at the editor - you'll find it, if not, ask me again, I will find it for you.
If you want execute a trade the way you described it, you should have a value of the indicator of the value shift(2), and shift(1) and compare them using if statement. Then set up your trade at the close/open of the current bar shift(0)current.

init() is a special function that runs before any of the functions, usually you put initial values of your variables there.
deinit() is a last special function to be called by the program before the program is turned off. It's placed not at the end for a special reason, but it executes as the last function. You don't have to put anything there, unless you want to remove anything before turning off the program.
Look at the bottom of MetaEditor and you'll find MQL4 site there.
Hope this is helpful.