A coin lands heads three times in a row, and it feels like today is your day. The coin knows nothing about your luck: on the fourth toss the odds are fifty-fifty again.
Signs of greed: you enter trades that course 5 would tell you to skip; you raise your risk above 1% “since I’m on a lucky streak”; you open several trades at once so as “not to miss out.” Each of these trades seems like a small thing on its own, but together they break the whole system.