Are there any APIs to get technical indicators(like RSI, bollinger band) from IB? It seems that no APIs for that. But just in case.
Not really. You have to use an external library like ta-lib to work on whatever backfill data you get from IB. I've done it and it's a pain. It's why I don't use indicators anymore.
its actually pretty simple to use TA-lib with IB, both with live and backfilled data.... here is an example using tradelink (which is free, open source and works with IB): http://groups.google.com/group/tradelink-users/browse_thread/thread/311ad59f73e48c00 http://tradelink.googlecode.com