Read the rules in each of the Challenges and they tell you where @revelationquotes gets the Closing Prices from. Don't know which challenge you are referring to either. On 1-JUN there is no Challenge that has that Price range.
Historical Data
Also, don't know which challenge you are referring to either. On 1-JUN there is no Challenge that has that Price range.
Thank you there was a confusion in the closing hours and price publication of the day of the contest.