Yeah, was a "local" from the mid-eighties until the trading floor switched over to screens at the end of 1999.
Trade mainly currency CFDs & Stock Index Futures from home these days.
Took a 1,000 lot position in 90-Day Bank Bill Futures (Short Term Interest Rate Contracts) back in the early nineties.
The leverage gave me a ½ Billion Dollar exposure - fortunately I got the market right.