What is jobbing trading strategy in stock market?

jobbing is buying and selling of shares within quick time(within a minute)for a very small profit..whatever the trade is u have to square it off within a minute..usually jobbers do this kind of trade continously throughout the day earning a handsome profit at the end of the day..for this u have to take training under some broker..u have to be really fasdt in order executions..these r done under profit sharing basis..say 60-40 btwn jobber and his broker..its a high concentration job only for yopungsters below 58 age..