Downloads for Newbies?

I see a lot of threads here with different trading systems. Example:

http://i42.tinypic.com/11hctol.jpg

And like in the picture above, there are downloads. I click on the download and in Chrome and attempt to install it into my Oanda MetaTrader Demo Account.

This is what I get.
http://i43.tinypic.com/xc3fib.jpg


And this makes no sense to me.

Can someone explain to me how I get the actual file/filter/signal/trigger into my Oanda Meta Trader program to actually use?

Thanks!

You don't have to open the files. Just copy the files in the /experts/indicators/ folder of your platform, then restart your platform. That's all.

Thanks, I appreciate the help.

You're welcome.