[sunt]

Camtasia is excellent for making educational presentations, and for many other specific uses involving a clean recording of screen activity. However, you are definitely impacting your CPU, and this is quite possibly not desirable on your trading computer.

I second the comment above about using a video cam. I advocate putting your video cam on a tripod, setting the placement and zoom so that the screen will be clearly visible, and letting it run all during your live trading.

There are multiple benefits of this, including documenting data lag, software glitches, brokerage errors, and most of all, documenting your own performance. If you talk as you act to provide a running commentary of your actions you will learn alot about your own behavior, and retrospective analysis while offline can help you determine areas for improvement.