i am watching real time webaniars and live trading rooms i observed
the prices on nymex and mcx exactly same time movement.
less than a second time difference.so there is no advantage of knowing the
nymex data.only difference you will find when you watch order flow in 2nd level data.only professional software analyse 2nd levl data like ninjatrader trade station. if you listen audio from nymex energy pit noise level (market gola )
you can get a idea before few secounds when go up or when settling down.