With bitcoin trading, especially when you consider the fact that a lot of the speculative activity is completely arbitrary and random, and there are many external factors influencing price, I doubt that a single supply/demand graph says much at all.

Also, I don't think that basing it off one single exchange's order books means that this data will be accurate - each exchange has their differing amount of liquidity at a given point in time, and does not reflect the big picture.

By the way, is there any tangible reason as to why you included a demand curve shifted to the right 500 units, or is that just an arbitrary number that you came up with to illustrate a potential increase in demand?