If you have a platform that can SMS you or similar, you could call in trades? I'm fairly much tethered to the computer for the day job anyway, so never been a major concern for me.
For trading without being at the screen all the time, definitely. Don't fret too much about getting them right though, if you prefer to put them far out and close most trades yourself that's a perfectly sensible approach too.
Custom built platform and algorithm. If my web hosting ever works again, you should be able to grab a copy from
http://lostics.org/forexquant/ (but right now the page just errors
), although I'm currently merging my work into
JBookTrader. From what I've seen so far,
Collective2 seems fairly good for finding auto-traders, although its currency trading support is terrible (during busy periods the spreads are insane).
I'm not sure I'd recommend anyone uses an algorithm they haven't developed, though. It's very hard to tell between an algorithm that truly works, and one which will lose everything 2% of the time, for example. This is loosely where I am; my auto-trader fairly reliably makes money, but sometimes it will explode and lose everything it made and more. The stabler and less exciting ones could be good for someone looking for an alternative to paying someone to manage their investments, but if you're trading and enjoying trading they're probably not for you.
I use one because maths and software development are my strong points, so it's simply working to my strengths, but I'm assuming that doesn't apply to you?