I hate to be the bearer of bad news but autotune won't be in 2.2.0
We prioritised the direct credit card processing over that. Its just about done and should be finally ready for the public soon. With the direct credit card processing we will be able to fully automate all of our order processing and thus free up a LOT more time for development, like autotune and much much more.
For now, you'll just have to live with copy/paste from histogram into RTT window.