If I have an existing spread position opened through the pit market, may I close it through the electronic market?
Yes, so long as it's the exact same market, (size, contract month etc.) it is not a problem.
Crude oil, gasoline, heating oil, natural gas --- Buy 'em? Sell 'em? When?
In 2008, crude oil traded its all-time high above $145/barrel --- and then collapsed in six months to below $35. Then, after running back up to almost $115, prices coiled for 3 years --- but then collapsed again, plunging from $107 to barely $42 in only nine months. Since then, sellers have emerged each time it has dared trade above $60. Within these larger secular movements, when would one expect seasonal pressures normally to force price higher?