maddz, I was not suggesting that the forearms should be angled. What I was suggesting is that you should avoid having them cradled or resting on anything - everything I've read, and my own experience, suggests this is
bad. Chair arms can be present to rest on when not using the keyboard but should not take the weight of your arms while typing. See this
image, it shows how the forearms are on the same plan as the hands but are not resting on anything.
I understand that data entry has different requirements to typing prose. Most of my work is involved in developing payroll solutions - LOTS of data entry. Okay, so I don't do most of it, but I do have to test all of it.