@brian-kho I've been doing it for 7 years, and although I'm not as bad as I was, definitely still wired outside of work. Find myself seeking risk and acting really intense. Not healthy, definitely not a life job.
Yeah, the old school calculator is a funny story. One of the old school traders gave it to me on my first day, And I thought to myself 'wow, how out of touch is this guy?' I had a scientific one, but when I tried to use it I kept 'fat fingering' when I was stressed.
It's amazing how bad your maths can be/and how fat your figures become when your under intense pressure, couldn't do without it in the end ;)