I use a certain procedure to identify a certain class of stocks that are experiencing an unexplained dip and I buy those under certain conditions. If I cant find any, I look for certain kinds of explained dips that I believe are due to overreactions or other kinds of investor error or that I believe are temporary.
Kind of vague. What kind of "certain procedure?" I mean what are you truly looking for? What convinced you this method is feasible? Did you pick it up through a specific book? What are your measures of success? What will convince you this method is good long term or not?