CurrencyStyle will be problem.

[derjohng]

The file JCStockGraphView.m:113~117, and line 121

// 2 - Configure y-axis
NSNumberFormatter *priceFormatter       = [[NSNumberFormatter alloc] init];
priceFormatter.numberStyle              = kCFNumberFormatterCurrencyStyle;
priceFormatter.maximumSignificantDigits = 3;
priceFormatter.usesSignificantDigits    = YES;

y.labelFormatter     = priceFormatter;

This will be problem while non-American International Region, as below image.
When "Taiwan" is chosen, and the "NT" dollar will be shown. That will not be right.
http://goo.gl/GBrbgz

[jconst]

Thanks for taking the time to report this. I'm not quite sure what the proper solution would be, though. Perhaps you could suggest something, or even try a fix and open a pull request?