Later on, the brokerage house he had been working for adopted his system for their trades. Much of Seykota's success was attributed to his development and utilization of computerized trading systems to which he first tested on a mainframe IBM computer.

Later, he decided to venture out on his own and manage a few of his client's accounts. In 1970, he pioneered a computerized trading system (now known as Trading System) for the futures market for the brokerage house he and Michael Marcus were working for. As a young man he attended high school near The Hague, Netherlands and also lived in Voorburg.