Thanks. Looking at the risk graph of these I'm just worried about how theta/gamma changes around with vol step up/down. I'm a noob when it comes to calendar spreads so I'm not sure what exactly to do for instance on a serious vol down and gamma / theta suddenly being all over the place. I was looking at potentially trading the Dec20/Jan03 1780-1830 strangle and closing it down on Friday, 1 week before expiry that is, because the theta/gamma/vega graphs seem more stable and nicer to deal with on wing-touch or on vol spike up-down. But I may be giving up edge elsewhere, Im sure the graphs dont tell the whole story. The edge of course I would be looking for is selling front IV, a bit away from ATM (skew) and hedging with back vol. Actively deltahedging the gamma, making theta but still having vega for potential spikes. Potentially rolling on wing-touches depending on my view. The downside being of course any strong upside rally which would destroy the vol of back-month. Thinking about potentially using VIX for hedges, I'm short vix most of the time anyways (into contango), that's why these seem like a nice idea.