I formerly worked as a semiconductor engineer, designing both hardware and computer-aided design software. Based in Austin TX, I now trade futures, stocks, and options. For the past 5 years, most of my trading has been on the Thinkorswim (TOS) platform, and I use its customization facilities extensively. I would be happy to hear from other expert-level "Swimmers" and compare notes. My other main trading activity at present is junk bonds; however, the opportunities in that market are not as attractive now as they were back in '09 and '10. Besides my engineering background, I also have a degree in mathematics, where my interests are in probability and data analysis.