fetch online value based on selection

[#1]

Hello,

     i am using qlikview 11 .

i have created master calender.and now i want to fetch currency rate baed on calender selection.

i.e if i select year and month, on selection  time value should be direct fetch from website.

is it possible. might be i have to use some trigger but i did't know how to use it and ehich.

So pls help me in this

Thank U

[#2]

pls reply