I was referring to the fact that CQG IC is the best integrated charting / execution platform that I am aware of for spreads. It's strength in my opinion is the ease of using custom technical indicators ( which I have developed for Spread Trading ), the breadth of the products supported, and the historical quality of the data.
I am not a fan of the quality of other execution platform's historical data.
If you are swing trading spreads, you have the luxury of economy on your side in terms of charting and execution. No need for real time charting data, and all you require in terms of execution is a platform that supports exchange spreads ( which is the way to go IMHO ). You can very effectively swing trade spreads for just a few hundred dollars per month for charting/execution.
If you have some sort of intramarket higher frequency arbitrage to exploit, And the backing for it in terms of ECN infrastructure and expenses, I would personally go the route of Orc or RTS - not TT or CQG-IC. Just my 2 cents, and YMMV.