Judging just from the image and title, I'm guessing they're demonstrating this as evidence that there's insider trading going on, as just prior to the US President making a huge announcement that rocked the economy, a sudden unusual spike in activity was recorded.

This does not seem likely to be unrelated, given what this graph shows as normal activity.

The author suggests humourously that this is evidence of precognition - of being able to predict future events using magic.