Both keep a fixed distance below a reference point and only ever move up. The difference is the reference point. Intraday trailing follows your equity high water mark in real time, so a spike in open profit raises your floor immediately, even if you later give that profit back. EOD trailing waits for the session close and uses your closing balance, so intraday swings never move the floor. In practice intraday trailing is the stricter model. On Nitro, evaluation uses EOD trailing, Sim Funded switches to intraday trailing with the $100 lock, and Live returns to EOD trailing that goes static at the starting balance.
