Turnip Merchant is a trading simulation.

The game will start on a Sunday where you can buy turnips at a random price. Then, you will pass through the days of the week trying to sell the turnips at the best price possible. You might also find trophies, which you can buy with your well earned money. These trophies will unlock some goodies. Each Sunday you will be able to save and view your trophies.

The game is still being worked on!

http://dsgamemaker.com/forum/viewtopic.php?f=27&t=3649&start=120