I do not have a "set" method on screening the stocks. Generally most DAYS no stocks even show up in my initial screen. Especially on days the market went up. However, when stocks do show up I normally have 10 or more that fit the description of what i'm looking for. Since these are normally on the days when the market went down which helps to produce the type of signal I am looking for. I posted earlier in this thread basically what that screen comprises of.
Once I finally get a list which normally will have 10 or more, I then go through each one and glance at the financial info for the company, make sure no important news releases are due within my 5 day holding period. I also try to determine what caused the stock to go down so badly. If its something very detrimental to the company then I avoid it. If its something as simple or stupid as an analyst downgrade then the likelihood of that stock making it to my final list is very high. If I have more stocks that make it to my final selection than I have room to buy then I mostly just go with the one that I have the best "gut" feeling about.