traders need three different accounts for trading process, bank account for money transaction purpose,trading account with sebi approved trading brokers for buy or sell the shares,and demate account for manage our holdings,trading have big advantage of utilize the each swing of the price action ,AS all of us know share price will not moving in one direction, it will go up and down due to secondary market sentiment,Traders can go long if the market goes up ,vise versa they will go short, this is the reason behind why most of the people choose trade rather than investment.