re: How many of you guys/gals day trade and have made it your career?

I had a coworker that spent a few years “perfecting” his strategies. He spent somewhere in the range of 80-100k in total part in building out a trading system that automated trading based on parameters he would set. He spent the rest renting data monthly so his trades could execute faster and store more data. It was the most data I’ve ever seen an individual trader use. He stopped day trading almost two years ago learning the hard way.