I used to be very big into algorithmic and day trading, and one trader I was introduced to had Martingale'd himself into a record of something like 2 years with

I used to be very big into algorithmic and day trading, and one trader I was introduced to had Martingale'd himself into a record of something like 2 years without suffering a loss. Then he suffered a 300k loss and wiped out all of his earning plus more and then he lost a lot of his followers, at least for a while.