Take a look at his third account that is at the bottom of the page. 20% loss in 1 week on a large account. $250,000+ initial deposit. And he's doubling down. And look at how much leverage he's using.
This is why traders fail! They take on a position that is too big and after a sudden move against them, the pain is too much so they double down and hold on, hoping for a reversal. And, the reversal never comes. And they keep adding to their position. He's short big size in USD/JPY and for all we know, it won't ever come back down to his entry price. Or, it might go to 110 before reversing.
If you can't take a big loss, then don't trade the big size. He should've taken that loss at 98.00 instead. Would have been far cheaper.