I lost $26k day trading. I had some good days, but I just couldn't let go of a loser until it was really painful.
Most I made in a day was $3500. Most I lost was $12k. Thankfully, I was ahead by the 12k when I lost it.
I was down almost $25k once and it turned around to make a profit. That one was crazy. Rose like a rocket and fell like stone. I took a short thinking it would collapse at one point and kept averaging up. Eventually I lucked out, but it could have gone horribly wrong.
Day trading on 4X margin is CRAZY.