Quote from PocketChange:
Rightedge uses the OEC API and should support all of its functionality. haven't gotten too far into the project.
No charge for their API or excel add in ...
Rightedge is licensed though.
They have a really good excel sample worksheet for pulling feeds and processing orders. Feeds are subscription limited to 50 instruments by default. For full otion chains you'll need to call them and they'll up your subscription.. Excellent Support.
Single instrument Feeds into excel running side by side against TT are pretty much in sync for our purposes (milliseconds). TT RTD and OEC DDE technically is a whole other debate.
So far we are very pleased with OEC and specifically their API and autotrading tools.
Unfortunately RightEdge doesn't yet support backtesting of tick data. Smallest resolution is one minute.