I want learn about link building for "Financial, Forex, Stock" how can i get links for my site and which way i can get this links.
make a google search. Secondly you can post over here requesting for link exchange. You can also get one way link backs from directories for free here is a list that i compiled http://www.selbourne.com/web-directory-list.htm
write an article and submit to article directories, there are so many good article directories prweb, prleap, ezinearticles etc.