In order to trade pairs I believe I need my charting package to have the following attributes:
1. Able to display a ratio chart of 2 stocks/ETFs
2. Have up-to-the-second accurate data for the above charts (not delayed)
3. The charting package could send alerts to your sms or email when certain price activity occurs e.g new high, Upper Bollinger Band crossed etc
Nice to have would be:
1. Be able to submit sell/buy orders from the ratio chart. I would think this is difficult so wouldn't expect it.
What is the best platform to use for this? What options do we have? I guess this question must have been asked before so if someone could point me to a discussion thread on the net I'd much appreciate it.