UI

The user interface will initially be a simple Swing window with a text box for each parameter and a window for log output.

This is made slightly more complex due to more than one race being traded in parallel.

I think I'll probably go with a log window for each race being traded - this could be configured in a number of different ways.

1) The log pane splits into as many windows as necessary for each race being traded.
2) Each race has a tab created for it.
3) Each race pops up a new log window separate to the parameters.

The UI can also show profit and loss in the main window.