Trading's generally focused on shorter-term gains (though people do trade long-term positions and swing trade as well), and investing's generally focused on longer-term gains. A lot of traders, especially recently, also trade on leverage and thus use precise plans to limit losses as much as possible while letting winning trades run and earn profit, whereas investors can have greater tolerance for shorter term fluctuations in price, because they aren't as big of a deal for those people over a longer timeframe.
What you need to know to profitably sell and buy? How are such plans built? What information are they based on?