The Windows are supposed to be in your end only, wih out put on demand/when you say to execute/push ok ect. the Round tripping is also supposed to apply, where the info stored to execute is on your computer(set pricing and such) easy way for any platform is call the provider and ask.
If you have executed an order, then the provider may well have the order, on their sever, and the provider can make access to the orders available to "commercial" rather than "retail" interest' best example is level on Bid ASK. To Make Market(and a slice).
How T or S operates I'm not absolute about, as I tried it and wasn't happy with it. TDA which self Clears, and sells multiple levels of L2/3/4 , is more than capable of letting MMs see stops, or stoplimits. Lots of Traders don't set stops due to this "feature"-where some Level 6 salesman in Bangledesh may see your exit point.
Call TDA, let us know what smoke they blow your way.
