@Yowster That's a good point, and it's something I look at when I'm considering straddles, typically through seeing how much the price of straddles increases as the strikes move away from ATM. I haven't figured out a way to model that, so for now it's purely a subjective evaluation.
I don't want to extend the discussion of the proposed strategy in this thread, since it's Djtux's dedicated thread for his service, but since it's an application that makes use of his service I figure it's ok to just give my logic. I haven't developed the method or backtested anything yet, but I'm organizing my thoughts as follows:
a) Straddles that are horrible for long positions because of decay should be good candidates (under some circumstances) for shorting, and I can find these with Djtux's Straddle tool.
b) I never naked short anything, so I'd use an Iron Butterfly setup to short the straddle. I could also make these into an Iron Condor, but that requires the assumption that the decay data calculated by volatilityHQ for straddles applies to similar strangles. That's an assumption I'm willing to make, but it's an assumption nonetheless.
c) Iron Butterflys/Condors are short vega, which is the wrong thing to be going into earnings, so to "fix" that I look to the long-vega nature of calendars. That's why I choose a later expiry for the long strangle. This is also another application of volatilityHQ, using the Calendar tool. If the relevant calendar gains significantly, then great. If not, then I wouldn't expect the setup to work well.
So, in summary, if the short straddle shows big decay and the long calendar shows a good increase, I'm guessing that that an "Iron Butterfly/Condor Calendar" that doesn't move a lot before earnings will be a winner, on average.
I haven't started messing with ratios yet, or anything like that yet. I'm nowhere near an expert in options trading, so I don't think that _I_ want to open a thread to discuss this strategy, but if you (or anyone else) wants to investigate and thinks it's worth it, please feel free to start a thread!
Djtux, hopefully you're not opposed to me posting this content here, since it shows how to apply volatilityHQ using both the Straddles and Calendars tools, but if you would rather have it moved out of your service thread, then please do so.