Dude goes from mall cop to trader, starts with 5k and turns it into 10's of millions(upwards of 80 mil),and you want to talk about the percent of S and P stocks positive vs negative???????
Dont forget to account for survivorship bias in your most excellent exercise...
And how many mall cops are still working as mall cops...?
I don't know anything about the guy and those returns sure make him worth looking into, but without knowing how those returns are generated it's hard to say how much is skill and how much is luck.