Closed our drawdown is the retracement from the top of the equity once a trade is closed, it is composed of a number of losing trades, largest drawdown in win refers to a single trade and to how much it lost from the top gain shown during its life (let's say you are in a position and at a certain point it shows a gain of 9000 USD and then you close the trade later on gaining 7000 USD so there has been a DD o 2000 USD)