I plan on signing up with AMP broker to trade micros and I currently use Thinkorswim for equities, which I really like. I was thinking of using a free platform with AMP simply for order execution, and doing the charting and data feed with TOS. My strategies are mostly chart based. Any thoughts or recommendations? I'd rather use a free platform as all the tools I use are in TOS. I suppose I just need fast order execution and the ability to do OCO orders.

https://www.cqg.com/products/cqg-desktop

Sierrachart is a solid choice... lightweight, fast, endless customization and rock solid stability... but it carries a rather steep learning curve.

Multicharts with CQG. Great charts and ability to trade from charts, OCO available