count with conditions

[bob1231]

hello i'm new to qlik sense and just wanted to know how to do this task

i have 3 columns: order, date1, date2

i want to count how many orders have date1-date2 greater than 0 

i used this command but it's not showing anything until i filter and choose a date but when i choose more than 1 date it doesn't show anything 

count(if((date1-date2)>0,order))