That chart isn't exactly designed to be used as a tool to aid in trading decisions.. It's really neet to look at but if you want info to use for your trading activity you want to look at the ticker and orderbook in a more structured manner. i.e., write a script for it or use one of the many trading apps out there that will let you plug in api data.
You are missing my point here. That chart IS (was) generated based on the API data. It is reasonable to assume that the glitch was in the data, not in the chart. It wouldn't be the first time.