<p>Your credentials are really good, especially if you plan on focusing in more math/science/economic fields. I think you should definitely tell colleges about the analysis software: that is a big accomplishment that very few students have done. I don’t know if it would fit in your Extracurricular section as much as your additional info, but you can decide that. I think you’re pretty much a sure shot at everywhere on your list except Columbia, Wharton and Yale (and that is simply because they are, as you said, crapshoots). I’m not sure about Brown because they are historically more inclined towards the liberal arts, but I think you’re a somewhat likely there. Best of luck!</p>