This market resolves YES if there is a (uninterrupted) hour period where the following conditions hold:

• the market is below 90% for the whole hour

• the largest market value during that hour is at most 10% higher than the lowest market value during that hour.

• the market is open during the whole hour (this should be obvious, but let's make it explicit)

The market will resolve NO if this hasn't happened at the closing time (a bit more than 1 week after creation).

This market will stay open for at least 1 minute after the YES condition has been triggered, allowing anyone (including me) to profit off this.