It's Sunday and 2300UTC

CME bitcoin trading opens at 5p.m. CT (UTC-6) on Sunday. This translates to 2300 UTC.
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Orange: CME open hour candle's range is smaller than the previous hourly candle

Fuchsia: CME open hour candle's range is larger than the previous hourly candle

If there is a blue highlight after CME open, that means the candle after the open has a larger range. Otherwise there is no highlight.

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Added notes

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Added helpful labels that are default off.

If CME candle open's range is larger than the candle before it, a label will pop up. Otherwise there will be no label. The same logic applies to the candle after it (the blue highlight).