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I don't understand what you meant here. According to TOS chat archive, delta is delta, and I don't find a multiplier of 10.

Let me see if I understand it. For a portfolio with a delta of 50, what does it mean? Does it mean that the portfolio will change by $50 with a change of 1 point in the underlying? (My porfolio has over 10 legs with rut, so it is better to look at it in terms of dollar amount)

I used ameritrade's greeks for delta neural hedging in the past. No wonder I didn't have home runs.:mad:

I also found that my broker (ameritrade) has greeks completely different from TOS. Ameritrade shows a delta of 50 whereas the same portfolio using TOS shows a delta around 7. How come it has this big difference? I don't really know which one to trust.

Murray, Too bad that I have used up most of my margin in my RUT diagonals and verticals. I only have small amount of buying power for emergency adjustment and don't have enough margin to open these positions. My broker charged me margin on both legs for diagonals. I called them and...

Murray, I like your diagonal. This requires only half of the margin.

I saw 4.3 there too when unlocked the price, but I don't think you will get a credit for this double diagonal. If I see a credit of 4.3, I will jump in without doing any analysis. BTW if you look at each individual option, you will find a 7.xx debit using the mid. I really don't understand...

I didn't want to see the risk profile at Oct expiration. I want to see the risk profile at Sep expiration (i.e. Sep 15).

I am looking at this double diagonal using TOS, but the risk profile shows that there is no profit range at Sep 15. SPX 1325/1375 Oct/Dec Call SPX 1275/1225 Oct/Dec Put The debit is 7.2. Attached is the risk profile from TOS. Did I not use it properly? Is it possible for a double...

Thank you all for the wonderful tips. This software is amazing. If I had TOS account opened months ago, It would have saved my time in understanding and programming option pricing models. :mad: With everyone using TOS, my edge is done?:confused:

Just registered with TOS. The software is too complex for me. Spent the whole day with it and I am having headache now. Who can provide me a quick-start guide?

wow, a profit of over 3K in couple days.

I expect IV is larger than HV in normal market environment. Recently I found that IV is lower than HV. Under what conditions does it happen? How does it affect our trading strategies?

The beauty of option trading is its complexity. It serves my ego very well :D . Too bad that I still have to eat :mad:

You can use the fair value for comparison. [Edit] I have never traded ES, nor future. My suggestion is based on theory.

Will they liquidate your position after regular trading hours if the margin goes up to a point that you get a margin call?

Murray, It looks good to me too. A good way for vega play when vix is still low.

wow. Your margin req has reduced by 50% already in a couple of days! So you can open more positions if you wish?

Opened a 2-month longterm double diagonal on RUT today. STO RUT 640 Oct Put BTO RUT 600 Dec Put STO RUT 760 Oct Call BTO RUT 800 Dec Call Net Debit = -335.2 for 5 contracts. My broker requires me the margin of both legs = 40000. Also opened a 750/760 sep call vertical for a...

I really don't know. If stock price movement is pure random, its future price depends on the standard deviation, and the current price. So when you know the current price is 36, the probability of going up and going down is close to 50%, independent of the past history. If you use TA, the...