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It usually depends on the exchanges where contracts are traded and might change from time to time. The limits for options and futures are quite large nowdays.

Have you guys tried the Options Lab at http://www.TheOptionsLab.com ? It only has a 2D diagram. What are the particular needs for 3D graph in option trading ?

The Options Lab will meet your needs well. check it out at http://www.TheOptionsLab.com It shows you the greeks for each leg and position and supports dynamic graph. No software download is necessary, just fill in the data for each leg, then hit Refresh button. Currently only four...

Congradulations ! That is pretty impressive and I am happy for you.

If the puts expire within a week, then two days' time decay will eat all your profit. Also sounds like he bought OTM puts, which is not that sensitive to stock move.

Will you consider selling naked SPY puts every month ?

The attached chart shows what you described is simply a naked put.

Since it is a long vega position, drop in IV will hurt it. Open attached chart to see the position vega, i.e. it shows total vega as $56.55, what it means is that for every 1% drop in IV ( i.e. from 35% to 34% ), the position loses $56.66.

You can talk about what a options price should be all day long if you like, but just never forget the fact that options price is ultimately determined by supply/demand. In most cases, LEAPS are not as attractive as near term months, for one thing, the leverage factor is much smaller.

I think for SPX and NDX options data, you have to find them somewhere else, then enter them in the Options Lab using the Offline tab.

The previous post mentioned ratio 3 means after ER, front month IV drop 3 times as much as back month IV. i.e. if before ER, IV is 90% and 60%, after ER, IVs will be 60% and 50% if ratio is set to 3.

ultra high iv itself does Not warrant a short vega trade. short vega only when you expect iv to drop soon. hope this helps

that was a far more bullish trade than you described earlier

If you look at carefully the strategy chart that pengw attached, the strikes in the two legs are different, so it is a diagonal ...

I think CRB means Calendar Ratio Backspread, which is not nirvana and has drawback of its own like any other strategies.

You can easily find the answers you are looking for by trying the different cases using the Options Lab. http://www.TheOptionsLab.com It is always hard to evaluate a ratio spread without any example or using any software.

Head I win, tail, I don't loss. Nice !

I have been using the Options Lab for quite some time and always like it. I wish it could support quote for futures options someday.

For that, Click on the Offline tab in the upper left section, then you are able to enter you own data, the Lab will calculate the IV for you and fill in rest of the fields. Change IVs in the upper right sections for each individual legs if needed. See attached long Iron Condor strategy with...

How complex is your strategy ? How many legs ? For a strategy with four legs or less, plus underlying, try Options Lab at http://www.TheOptionsLab.com Good luck !