TD Ameritrade:
Sept 20 CL outright margin: $11,325
Dec 20 CL outright margin: $9000
Sept 20 - Dec 20 1x1 CL calendar spread pair margin: $3,075
Others cannot be traded as exchange spreads at TD
Large but conservative FCM:
Sept 20 CL outright margin: $8,305
Dec 20 CL outright margin: $6,600...