Why is the trailing drawdown the hard one?

It follows your peak equity up and never comes back down, so giving back a gain moves you toward a floor that kept it.

It is measured from the highest equity the account has ever reached. Go up four hundred and give it back, and the floor keeps the four hundred. You are now four hundred closer to losing the account than you were before the winning trade.

This is why traders lose these accounts while showing a flat balance. Nothing about your closed profit and loss tells you where the floor is.

It stops climbing once it reaches a hundred above your starting balance. From that point it never moves again, and the account can no longer be lost to a drawdown from a new high. Reaching that point is the whole game.