- Harouna Traore, a day trader in France, thought he was using a demonstration version of British brokerage firm Valbury Capital's platform.
- He opened an account with about 20,000 euros, or $23,000, after using the demo during an educational course in Paris.
- Traore racked up a loss of more than $1 million before he realized the trades were real and, instead of quitting, he kept trading for a profit of 10 million euros, or $11.6 million.