I had a thought this week about what constitutes my "trading edge". You know, the question every trader is expected to be able to answer. It's supposed to constitute some kind of evidence that you can out-perform the market, your peers, or whatever. Something Bob Pardo mentioned made me think differently about this when he reminded me that when trading pits were around, every trader "had to have their edge" to stay ahead of the other guy or gal. Back then, on the floor, it was necessary to have some kind of "insider knowledge" so to speak in order to carve out success.
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