I was thinking about something like this before. I assume that this is where the value is extracted at the time of writing this code, I guess that it is not difficult to add the exact time/date of that value.
have you thought about offering sharing codes right away on the site, and not only as BB codes? something like the one we have on image-sharing services. also, make it clickable to your site

Wow, I'm speechless <sup>[I should be the one thanking you for implementing my suggestion in the span of a few hours (you're a lifesaver)]
- May I know how short the intervals are? I stopped tracking it after it passed the 15-minute mark (I do know there are certain limits, so I'm not hoping for it to become very short).</sup>

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I did notice a minor issue while I was refreshing the page like a maniac ^{[e.g. the result that had the currency parameter temporarily showed blank, but after a few refreshes, it came back (the default one wasn't affected)]}.