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You can also trade options on the FX that are listed on ISE.

Gaps are what will eventually kill you. So risk management, as you have correctly noted, is the single most important issue, which means discipline in following your strategy and not overleveraging! Sure you can, but the key is identifying the changes in trend and even then the markets don't...

I guess, if you plan to make frequent small transfers then maybe that's important to you, otherwise it's really all the way down the list of things I look for in a broker.

Getting live data into an Excel spreadsheet is a breeze with thinkorswim. Just open up the chains, click "copy" and then paste into Excel.

Don't mistake bear market for brains. Of course your friend has been doing great, the market has been doing nothing but going down! However, if the market turns then your friend's high leverage naked call selling is gonna wipe him(her) out!

With the new backtesting feature I think yes, but I haven't taken a detailed look at it yet. You can also chart option prices.

In Thinkorswim all you have to do is bring up the option chains and you can see straight away what that option represents - i.e. is it a standard one or adjusted for splits/mergers, weekly, quarterly and etc.

Actually, no, it's not American vs European. All options on ETFs are American. The difference is that DIW is the normal Mar contract that expires this week, the IQX is the quarterly contract that expires at the end of the month.

Thinkorswim is free for clients. So is Optionsxpress. Otherwise Hoadley's excel tools are good value for money.

Rather than arguing the maths, I opened up a pricing model and simulated a 2 for 1 stock split and here're the results. On a position basis: Delta doubles. Gamma quadruples. Theta, Vega and Rho stay the same. On a per option basis: Delta stays the same. Gamma doubles. Theta...

I really don't see why would the position greeks changes!? It is and should be a wash.

You can negotiate with TOS, if you do reasonable volume. Ask them!

The interest rate differential is priced into options so I don't see how you could earn anything. Whatever you gain on the underlying you lose on the options.

There's no such thing as the "best setup". Everyone has a different one.

TOS is hard to beat, but as others suggested, it depends on what you're looking for. Hoadley's excel tools are good as well.

Volatility is scaled with the square root of time. So if you have daily volatility you multiply it by the square root of 250 to get annualized, and to get monthly from annualized you multiply the annual volatility by the square root of (1/12).

See here.

IWM, SPY, DIA.

Options on VIX are priced off of corresponding futures.

Search for "price improvement" on BOX.