You can record notes associated to a stock. What you record is really up to you. Users have expressed the desire to record past experience and ideas for future trades. A color and font panels are available to format your notes the way you like it.
You can simulate a trade.
You can get a few key a few key information on fundamentals for a given company. Remember, Mastock is a technical analysis oriented software. Fundamental informations are extracted from Yahoo Finance sites; they are as reliable, as up to date and as available, as Yahoo makes them so.
Finally, for each stock, you can have your trade history.