The requirement
At passing, no positive trading day may contribute more than 35% of total net profit. This check keeps an otherwise open evaluation open; it does not itself cause a breach.
For example, $900 in one day is 45% of $2,000 profit. With no larger day, $2,575 total net profit brings that day below 35%; every other passing condition must also hold.
The trading day
Results use a fixed UTC−05:00 day boundary: rollover is at 05:00 UTC. It does not change for daylight saving time. Realized closes and settlements count when recorded, rather than when the position was opened.