You can only purchase American stocks right?
Anything (stocks, not futures, or equities) traded in the NYSE
, NASDAQ, AMEX, etc are able to be traded. At least I'm pretty sure. Read the rules to make sure.
Akumas, you might google for "Stock market strategies" or something similar to get some basics. I've got my own little strategy. I'll consider sharing depending on how I do. It's certainly not a strategy I'd use with actual money in the market, that's for sure.