Thank you for your reply JuanC, it was really helpful and it solved my problem indeed!
Got one last question on the matter though.. My XValues are dates in ISO format such as "2012-09-21T23:00:00.000Z"
But if I use the %x symbol I get only the date part of the value and not the time part. So I get something like "09/21/2012" instead of "09/21/2012 23:00 GMT+03:00" or something like that.
Is there a work-around on this? Because I see that all the charts dont show the time at all and they only keep the date part of the ISO formated date that I provide.
Thanks in advance