Looks like the off-the-shelf software ChartDirector.
I just hope it's GoDaddy-"Verified & Secured"! LOL
It is. I couldn't find some non-Flash charting software better than this.
Dealing with their Java-ish naming convention is a pain for a Ruby developer like me. But at least they support Ruby language.
Do we need SSL for this? The cookies of Bitcoinica are not accessible at subdomains. And since ChartDirector contains proprietary code, I have to run it on another server with a read-only database account, for security.
We have a wildcard SSL though. Will consider this option if really necessary.