Yes you can. You need to have TOS up and running . Then open up ONE on the upper left corner click configuration and have live feed thinkorswim enabled then click back to Home screen. Click "LIVE" up by the date area. You then can model your trade and when you're ready to send it to TOS you click the commit button. The commit /save trade screen pops up and down on the left corner of that screen will be a thinkorswim box and arrow. Click the box to send to TOS and save on ONE or click the arrow to send to TOS without saving to ONE. You then go to your TOS Trade screen and on the order entry section you have to click on the clipboard icon and paste your trade in. You should then see it populate.