Right now is a right time to own some shares from the building...

Right now is a right time to own some shares from the building material company, but just need to wait for a right price to get in. no one knows where is the right price to get in, because every one has different formula, all I can do is using market, using bad news and using people's fear and be very patient for the price I'm willing to pay.
I am not sure why they don't sell aluminium, but construction needs to use a lots of aluminium.