You need to go to the AFL Library at http://amibroker.com/library/list.php
then do a search for "historical volatility" and "implied volatility". Leave off the quotes.
Yes it is a big deal. You can now expect junk mail to snowball. Your email will be passed on to others. So you might have to change your email one of these days. I never sign up for anything anymore.
Sorry to hear about your friend. If he has TradeSeeker, then he must have got scammed by Teach Me To Trade.
Didn't the gov indict these people last fall?
I've been using DTN IQ for about 6 months now and I am satisfied with it so far. I switched from eSignal for the very same reasons. I might not push it to the limit that some people do, but it works well for my 1 min. and 5 min. trades.
If you ever have any dealings with Jim Crimmins and tradersaccounting, you will soon realize that they are not interested in helping you, they will complicate everything and get you deep into a corp just so you will be dependant on their services with high fees.