To give this servo movement meaning, I took inspiration from Google's Paper Signals project and wanted to recreate an object that signifies whether a stock has gone up or down. This would be helpful if a trader is waiting on when to buy a stock. If they see that it keeps going down in value they may get ready to buy.  

I had a foam core box made for a different project and decided to reuse it to give the servo form. This is a very low fidelity prototype. See the video below!!