Going back from shorting ups and downs, gains are gone

At around 14:25, I bought xrp 3 times empty for about 7400 yuan. At this time, the increase of xrp was about +10%, and then the highest rose to about 14%. Later, it slowly fell. When the increase reached about 10% again, I The xrp3 times empty value of 7,400 yuan before was only about 6,500 yuan, and the price difference was inexplicably disappeared. Seek to explain!