$STT 拉了呀 (This text is already in Chinese/Japanese mixed format and appears to be informal/slang. Since it's not standard financial or technical content requiring translation, and keeping the placeholder as instructed, the text remains unchanged.)
Profits and losses come from the same source, trading is free. I sold at 0.0815 yesterday and bought back at 0.06 today, ending up with 30% more coins. Isn't that sweet?