Hello R Finance experts!

I would like to calculate market breadth indicators using data from Yahoo (I
would use quantmod) or Interactive Brokers (using another great package
IBrokers). I would like to create something simmilar as Stockbee Market
Monitor
http://stockbee.blogspot.com/2010/08/understanding-market-monitor-part1.html
using
data from Yahoo or IB using R.

First I need all the symbols/tickers of common stocks available for trading
from either Yahoo or IB on a particular day. How can I get the list of all
common stocks traded from this two sources?

Are there any market breadth indicators R code available in existing
packages? Is there any article/blog post showing how to approach data
collection from Yahoo or IB in order to calculate market breadth indicators?

Best regards,
Samo.

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