Something I have not mentioned, but quite important:
I can also enter the trade the other way around. Instead of shorting the two calls, then place a break order to long the futures, I can first long the futures and if it fails to move up to my liking, then short the two Calls. The advantage of doing it this way is the Calls are closer to being In-the-Money, thus more expensive, I receive more premium for them, which widens that trading range considerably!