Yes, users are allowed to hold simulated positions trades overnight on all evaluations including E8 Trader accounts, however as a user, you should be aware of bad market conditions that may occur during a market rollover.
As a risk manager, it is your job to determine the risks and rewards of holding a position overnight, as we do not want to limit a user’s strategy. However, if a gap, slippage, or wide spread causes a violation, it is the user’s responsibility.