Volatility is a very complex concept that has a bunch of layers, and so such a statement requires a bunch of supporting logic and has a number of permeations based on that logic. (I assume OA has that logic somewhere?) I'd strongly encourage anyone who's trading options and
especially selling options to actually take the time to understand what's going on with volatility, as volatility is the specific thing that makes up [almost] all of the extrinsic value of a contract. The CV uncertainty due to implied volatility is
literally the thing that's the seller is selling, so why wouldn't someone want to understand it, right? FTR Rho (interest rates) is the other thing that feeds the extrinsic value, but its
way less of an impact and generally not all that important to consider over the life of a short term contract.
If selling options was house hunting for 4 bedrooms, 3 baths, a two car garage, and a bit of land to spread out, selling options without at least a basic understanding of volatility is kinda like like setting the Zillow filter to
studio apartment in high density housing and hoping for a result. Seriously, its THAT important of a concept.
It would be a good idea figure out how your broker computes margin requirements. It shouldn't be hard; they all have some kind of page that explains margin for different position types.
Typically for an Iron Condor margin requirement is equivalent to the downside/risk of the larger of the two spreads. That make sense, because you can explicitly only get into trouble on one spread or the other, but not both...so they just make you set aside enough money to cover the worst case scenario. In your case it margin typically be calculated at [40 spreads * $5 spread * 100 shares = $20k]. Maybe there's some unique equation with your broker that adds the margin requirements from both spreads of the IC? That's not like a terrible thing, but after all its
your money, why
wouldn't you want to know?
Not the way you've built it.
Don't get me wrong, I'm a big fan of credit spreads and ICs...but there's a pretty steep downslide slope to them, and their
time and a place isn't 'every week'.
Your 650/645 strike on the put side with underlying [then] at ~$650 is pretty ambitious, especially with just a $5 spread. That means if price lands under $645, you're ~$13k in the hole. So with your very ambitious target of $6k/week that requires at least two
more weeks just to claw back to net zero. Given that agressive of a strike will likely land the spread ITM at least 30% of the time (and probably more), if you have to burn ~three weeks to return your balance to net zero 30% of the time (so, every ~3 weeks), your "best case of $300k/year" turns into a much more probable "closer to a goose egg on the year".
FWIW If you're looking to maximize return on margin, do some quick excel math on the width of the spreads. Intuitively $5 is a little too close. Last time I checked (this was probably a year or so ago) the sweet spot was more like $15-20 spread...but either way, excelifying a current options chain will give an exact answer.
If I were building short term ICs (and I'm not right now) I'd probably be looking at 550 and 800 as decent bookends and maybe a bit closer if literally just weeklies (so, selling on Thursday for next Friday). Spreads probably on the oder of $20.