digits

Hi All (Example 1) : (usd/jpy) @ 103,09 ( a 2 decimal quote) and I would like to add 10 pips and get the price & also like to subtract 15 pips and get the price. BUT my mt4 is a 5 decimal digit interpretation(thus 3 decimal for JPY). How do I go about this ? (basically I need to know how...