Denis Dariotis, the 22-year-old founder and CEO of cryptocurrency-focused trading software firm GoQuant, remembers the constraints and pressures of maximizing his trading portfolio while he was still in the third grade at school.

“I remember telling my teachers I had to take 10 minutes out of class to check my portfolio when the market opened and closed,” Dariotis said in an interview.

The child trading prodigy recalled how a teacher wanted to see his computer screen and what he was trading. But he shut the laptop saying, “No, I’m afraid that’s private” — an interesting presage of the crypto-focused dark pool app Dariotis released just last month.

Dariotis grew up in Montreal, where his earliest memory of the trading world was…