I'm investigating about a week for an interactive and high performance financial stock charts for an iPhone application "something like candlestick/OHLC charts for stock markets", I found CorePlot, which is open source and free, and ShinobiControls, which is very lightweight and perfect and paid, I was wondering if there other suggestions should I look upon?
You can try, https://github.com/honcheng/iOSPlot/tree/master/iOSPlot . Also, if you want to get your hands dirty a bit if you don't know JS, you can try http://g.raphaeljs.com/ which has some great charts. Accept this answer if you feel as though it met your needs, thanks.
Have you ever tried Fusion Charts?
It's the best charting library I've seen. I've used them for web projects and iOS projects as well since they have now JS versions of everything.
Pretty complex graphics, wide range of charts, and even real-time widgets which can fit your particular needs for this project.
They're not free but totally worth it to consider. I've done everything related to pilots and demo projects with the trial version.
Check them out at http://www.fusioncharts.com/demos/gallery/
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