The GuardianDay trader tries out 'demo' platform, ends up with actual $5 billion positionMarketWatchThis week has provided the tale of a huge demo-trading platform mixup, and it's on a par with the story of the guy who launched a GoFundMe drive after a short bet went horribly wrong. Harouna Traoré was making trades with Valbury Capital last summer ...Trader's €1bn deals voided after 'demo' platform mix-upThe Guardianall 8 news articles »