So, my first reaction, is I wouldn't use it, but I don't own stocks so that is not a surprise. My second reaction is who would use it and I get stuck there too

So, my first reaction, is I wouldn't use it, but I don't own stocks so that is not a surprise. My second reaction is who would use it and I get stuck there too. The front page is not that valuable, because it is relatively easy to add up to 100. The second page where it aggregates the portfolio into one graph seems useful, but in order for a user to actually use that page, they would have to commit to a portfolio on the front page. This confusing me because I thought the whole point was to get information while you were building portfolios. You should consider moving that graph of the combined portfolios to the front page under where you enter the stocks. This way when people are adding and subtracting stocks they can actually see what impact it has on the aggregate and then maybe your site can be useful for that. Overall, I am instinctually concerned about your site because it seems like you have put a lot of time and effort into something that doesn't do much, which is exactly the opposite of what you want to do with a start up. Generally you want to put very little effort into a site that does a lot!