The following video shows how to scale out of an order in thinkorswim, both with the traditional order process, as well as with Active Trader. It also shows how to use Active Trader to set up a bracketed order, where we get in at a specified price, with two targets and two stops using Active Trader. The example uses Futures, but could easily be applied to stocks by using the price values rather than ticks. For example, one could use this technique to buy 100 shares of AAPL and use 2 exits each with their own stop for half the position. (After watching the video, see the image below the video for an example of this).
Example of using a template to buy 100 shares of AAPL with two 50-share exits - 1 with a $2 gain, the other with a $4 gain, and both with a $1 stop. Note that if the stock rises as planned in this example, once the $2 target is hit, we can increase the stop on the second half to break even or possibly lock in gains by manually sliding the stop closer to price.
Here's a closer image of the critical settings. Note that you can change from ticks, to dollar value, to percent, by clicking on the +/- symbol.