The only thing next to human brain perhaps which human could not understood is perhaps stock market. One of the most complex markets which allows every other person to play a game called as gambling( or equivalent probably) is also the most interesting one.
well the art of making money through this market is something which hardly anyone could have mastered but it is also said that patience is the key and people who have stayed with their investments, have mostly benefitted, Buffet and Mr Jhunjhunwala are to name a few.
A few other tips which are mostly to be considered are the management of the company which always has a long term effect on its growth, the future plans and diversification and the volatility of the industry in which it operates.