- 1st round: Online Assessment testing various Probability and Math questions - 2nd round: Phone interview. 15 min behavioral and 3 Math questions - 3rd Round: Phone interview with trader. 15 min behavioral and 3 math questions. - Final Round: Did not make it Standard probability and brainteaser questions. To all those who are good at these problems: To become a trader, being good at these questions is only half the qualifications. During the 3rd round, I calculated the complement probability in one of the questions and didn't notice and kept telling the interview my math is right (which was but I was calculating the wrong thing). To become a trader, you probably need to keep your cool and not get stubborn. That's the other half of the qualifications. I feel like I would otherwise have made through the final round and gotten an offer. But I failed to keep my cool, so I got rejected. So if you really want to be a trader, also work on keeping your cool.