With so many stocks in the market out there, it is very difficult allow one to identify the highest profitable stock.
Hence for me, I would look at market trend and focus on selective sector such as tech or medical. Next I would look at its chart for historical performance. Since I am more into investing a long term, price fluctuation plays a great role in the selection. A low fluctuations with increasing trend is the most ideal stock. Another factor in my consideration is its estimated outlook and sustainability in the future. For beginners like me, I would first go for blue chips stocks such as DBS local bank or Apple stock in the US where they have large market capitalization.