I don't think there's any such concept as a natural trader, it's a birth by a thousand cuts, he has to suffer those cuts and bruises so yep it's not even beginner's luck, it's just luck, he's not even a beginner.
As for the footy analogy I can't agree, the game is 90% perspiration 10% inspiration and the players that make it are mature enough to know this. The x-factor that kids need to make it right through to getting an offer from a top club is an intangible mix of hard to define qualities. For every Rooney there's a hundred Nevilles who also get there but through having; a desire to win, to compete, never lie down, but little in the way of stand out playing ability or skill. Their capacity to listen, work on their weaknesses, be team players and walk through walls sets them apart as a breed.
Traders are made not born..imho..🙂