Stock markets is just one area but there are so many other areas where trading happens like bond markets, money markets( T-bills etc), FX, derivatives( interest rate, credit, equity, commodity). I dont know how active the derivatives and FX markets in India at present. I'm sure they will pickup in few years time.
The people which I was refering earlier worked as developers initially and acquired good business knowledge and moved into trading desk when they got an opportunity. They are doing pretty well in that role.
Just stick to one business area, learn as much as possible and move into business role when you get an opportunity.