Hi Karel, I've been away a while because of computer crash that saved sites as "about:blank". Oh, well, on with the show. a couple of questions and one tidbit.
The first question, earlier this month you said: "- AIM BtB 3rd edition style." Could you explain that, please. Somehow I'm not making the connection.
Then in this post you said: "I was thinking about taking a 1/N approach...." What is the "N"?
Now the minor tidbit. At TDAmeritrade options buying/selling did not got to zero, but it did drop to a tiny bit less than half of what I was paying before $1.25/per contract. Now I pay $0.65/per contract. This appears to be the price everyone is now paying, while before it was $1.50/per contract or more.