"I STILL WANNA KNOW".....I missed the boat few years ago, when I had the idea but didn't know how to go about it because I do not have software/coding knowledge or background....I found some of my idea implemented by Robinhood....But it still missed quite a bit....I think a better platform can be created......As far as expensive is concerned, I can find investors....what is required is the right business model...I am in the best city in the world and probably can make most of it...We may find a way to implement in india as well