I have a few trading accounts most follow the calendar spread. Returns beat the market on a yearly basis. I have one that does not do to IRS and brokerage limitations. I am not able to do spreads. I can buy/sell, cash secure puts and covered calls. I tweaked this account to only trade leaps on five companies, rebalance anytime the option price lets me sell or buy with staying at the set allocation balance that's established each calendar year. To my surprise this has done dramatically better up 94% for last year, and already up 24.21%
Everyday we are learning and new methods can be developed. If I see another double this year big changes will be coming..