Forward toward wing
This special position was introduced in the middle of last season (somewhere at the end of Octobre 2005). This forward contributes more pressure to the side where he is playing "towards wing". So this is how you can boost you side attacks (specially if you play with 3 forwards)
A team that is playing 3-4-3 or 4-3-3 could opt for a high-wing FTW because they are getting central attack already from 2 normal forwards (and possibly 2 IMs offensive).
They would be essentially moving their winger up to the FTW role and possibly using their winger slot for a WTM (Winger Towards middle) to boost their midfield.
The introduction of FTW gives forward trainers some options rather than just 3-4-3 AIM.