Skype interview with math questions, asked if I was interested in Markets and many logic based questions and how I came across the answers I had given. Involved sitting at the desk in the Chicago Office and watching the markets all day.

Initial online maths and probaility test, Normal screening interview followed with a final interview with a senior trader on the desk which was behavioural and technical.Advice is to brush up on typical quant interview resources such as the green book.