So...i am a software developer and thinking on some catching software idea that will sell well. I am considering to create a software that can for instance: Calculate SABR volatility, calculate black-scholes, calculate fx options kholagen model, predict prices based on neural networks, calculate var, sortino ratio, sharpe ratio, follows progress of your portfolio. Anyway...the idea is this to be like a swiss knife for the professional investor. Do you think it will sell? Like...in that economy and given that most mentioned things can already be found free in google. Also, i have about $60k put aside to invest in such venture and planning a price about $500 per one year license. 10x!