How to access advanced trading options

To access additional trading features where you can specify the number of shares you want to buy/sell vs. using our default options:

1) Click one of the default options;
2) You'll see a "Use advanced mode" link next to the "Submit your prediction" button. Click it.
3) Now you're in the advanced trading interface. If you successfully complete a trade with the advanced interface, it will become your default. To switch back, just click the "Use simple mode" link.