I'm sure that I'm not the only one who has trouble figuring out this position, so this topic which I found explains quite a lot (Including why it doesn't work very well in the EPL!!!)
http://theawaystand.co.uk/2010/12/whats-a-trequartista-everything-you-need-to-know/
If this is in the wrong section, please move it.
http://theawaystand.co.uk/2010/12/whats-a-trequartista-everything-you-need-to-know/
If this is in the wrong section, please move it.