Great job OP! I've been waiting for something like this for a while. Right now my screen res is: 1366 X 768 and it's a bit out of whack. But I'm sure you'll optimize it when you can. I also use: 1280 x 800.
It might be a lot to ask, but give the user the ability to change the size and opacity of the "Add.chart" would be great!
Keep up the good work!