You are over complicated yourself and waste your energy in the wrong place.
The more legs you are opening, the more negative expectancy you will put yourself in due to slippage and commission. You only become the best customer to your broker or owner of the bucket shop in this regards.
If you are bullish in the so called "resistance line", just long OTM call, otherwise just long the OTM put. If you believe the price will stay in the resistance line for a while and will reverse down to support eventually, just open a plain calendar put position, hold your long put after the short position expired and collect the money in your long put. Open calendar Call Position if you believe the price will stay in resistance for a while but breakout to upside will happen eventually.
The billion dollar edge will be : How can you tell if the price will whipsaw for while, OR breakout OR reverse in the resistance line ?
Now that he has explained himself, I actually do understand what he is trying to do. For the long, he is trying to protect his downside by buying the put, but he wants to pay for it and maybe make some money from theta by selling the call. Sounds nice in theory.
What I'm not at all sure he understands is that the markets reward taking risk, the more the hedge, the less the rewards.
When I first started trading options, I thought verticals were a wonderful idea. Certainly in futures magazine there were many articles on how to structure verticals and how wonderful they were. One time I bought a put vertical with a $3 spread in TLT. Since the front month expiry was like two weeks away, I bought the second month.
Two things happened. Firstly it went down like $5-$6, and secondly it took only 3 weeks to do that. So not only did I get half the value of the move, because of time premium, I had to wait another 3 weeks to realise the full value of the spread.
The best lesson I had that the market has a price for everything. I never traded verticals after that. Either I had directional conviction or I didn't. To use my favourite expression, you can't be a little bit pregnant; you either are or you aren't.
n ftse it has to be valid on ftse (not s and p , dax , dow , nasdaq