After all, while stocks and other investments can go up, they can also go down. The core features of the app are focused on tracking stocks you own and on your watchlist. Users of this app can enter any specific option they wish to track. These include signals from technical analysis and from social media trends. It is a relatively simple application that offers an options trader the ability to utilize stochastic modeling to show projected payoffs of a stock option over its lifespan until its expiration, displaying the results in a histogram. The Stock Option Simulator.