Getty Images Sacré bleu — this trade’s for real?!Day traders can do the darndest things. This week has provided the tale of a huge demo-trading platform mixup, and it’s on 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 — on a try-out version of the British brokerage’s platform, he thought. But the French day trader discovered that in fact, he had been placing actual orders worth 1 billion euros ($1.2 billion), according to a Financial Times report. Traoré, who opened an account with $23,000, found himself in the hole by more than $1 million. But he managed to turn that real loss into an actual profit of more than €10 million ($12 million), as he built up a $5 billion position in U.S. stock futures, the FT report on Thursday said.via