I have always vehemently disagreed. I cut my bones, LIVE hogs 'n bellies, bein' a Merc Jerk. And, not front running or scalping ... but position trading.
Made one "fortune" and lost it. Came back and made another "fortune" and blew it .... The next time ... didn't even own the seat ... just leasing ... Stopped right before the "fortune" point ... walked away with a bundle .... Not the previous "fortunes", but enough to fart around the rest of my life ...
I traded, as an outside trader, the "lean hog" crap. Judas ... I hate phony, fake, made-up indexes. If you can't make or take delivery ... it ain't a commodity. Trying to make the game something that little girls can play.