Add support for E-mini contracts on GLOBEX

[Bomper]

It's MLK evening over in the US right now (10:30pm Eastern) and GLOBEX is in session, but fincal.calendar('new_york').areMarketsOpenNow(true) returns false because the code concludes today is a holiday.

OK, GLOBEX is not "new_york", so this might be a feature request to add "chicago", but the logic at line 421 is still wrong for E-mini contracts that trade for 23.25 hours a day.

[zgsrc]

The calendar you are using is for the nyse. You can create one for globex. But otherwise the code wouldn’t know your specific market.

[Bomper]

Should I submit a PR for a market called "GLOBEX"? Or "Chicago"? Or "CMEBOT"?

[zgsrc]

Well, it's really not Chicago anymore. The locations are really meant to match to equity markets in specific locations. If you are using the ib-sdk library, you can use the security.contract.areMarketsOpen/areMarketsLiquid instead.