This. From OP's blurb it's pretty obvious he's very new to this and most likely hasn't traded much stocks even using the "simplistic human investing" approach. If you're planning on using this exercise to help "mature" your understanding of how you should start tracking/investing stocks then this could be a rewarding effort. If, however, you're planning on jumping straight in to build this to "actually" trade stocks I'm afraid you'll be in a world of hurt before you even know it. If you're serious about the journey, then the choice of programming language or DB is a long long way down the road; start from the basics and work your way up from there.