So first of all it depends on how much you trade and how much you invest. If you invest more than 10,000 USD than there are definitely nice trading softwares around, but you will have to pay for them. In case you only start out with trading I would recommend just use a nice excel sheet and track your positions and performance. You won't have to pay any money for it and can adjust it for your own needs. Make sure you put down your positions, trading fees and daily volatiliy over the last year. From that you project possible fluctuations of your portfolio.