Judging stock prices

Many of my colleagues in India are interesting in stocks in BSE and NSE and often brainstorm about recurring companies and up-and-coming market price of the companies. Out of my curiosity, I asked them the factors on which they decide where to invest. Here were some stated below:
> Profit per year
> Stars/ratings received by other websites/forums
> YoY, MoM and DoD profit till now
> Valuation of the company.
> Fixed assets.

Is there any software that can customize their needs? If not, any guy who can write a few lines of code provided the ifs and else in the equation?