Thanks for all the replies from the elite traders. Some tips I gathered; - Trade off the charts. - Avoid keying in orders manually. - Use OCO orders - Use keyboard short-cut hotkeys. Hope I did not miss out anything else.
Human error is unavoidable sadly, manual trading maybe you can eliminate 99% of errors through diligence, but say 1% will always remain. Automation helps eliminate say 99.9% or even 99.99% of human errors. But still 0.1% or 0.01% remain. Especially when doing a software upgrade of the automation software, new software upgrade code is always a bit untested and could contain new bug let in by the human developer.
%% Good\ because sounds like a stock like that could have just as easily ran another 50% against you......................................................................... I accidently spelled Sunday, an attractive woman's name 40% wrong, but 60% right. Good thing math is not her #1 priority