Leaderboard

Yes. CML trade machine shows a straddle and strangle strategy on the side, but it uses the delta pairs you set up for the backtest. It doesn't rename it.

For RV purposes on charts, the double calendar was always the call calendar and the put calendar at the same strike (I think this was done because sometimes puts and calls can trade at different prices and this was a way to factor in the difference). Practically, we open whatever calendar is cheaper and will often open another calendar at a different strike if the stock price moves. Summarizing, the double calendar RV in the charts is for the same strike and is used to indicate when the calendar price is trading at a good level based on prior cycles. The double calendar in actual trades is calendars at different strikes (either centered around ATM when you open the trade or opening one ATM and opening another one later as the stock price moves).