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catalyst/tests
Eddie Hebert afbe3cdcd7 ENH: Volume based rolls for futures.
Add roll style which takes the volume of the contracts into account.
If the volume moves from the front to the back before the auto close
date, the roll is put at that session.

Also, factors out some of the common logic shared with calendar based rolls.
2016-10-25 14:08:21 -04:00
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2016-09-20 17:12:09 -04:00
2012-05-09 13:34:13 -04:00
2016-08-02 23:12:07 -04:00