I am new to Quartz and I would like to draw a candlestick chart in iOS, but I don't know how to do it.
How can I draw such diagrams? Are there any good examples for iOS?
Core Plot can do this. If not, then it's probably pretty easy to add to the Core Plot library.
http://code.google.com/p/core-plot/
You can do this with SwiftCharts , there are two examples of candlesticks ready to use - one interactive and the other non-interactive (with less overhead if you don't need interactivity)
(Disclosure: I am the author)