Data Alert Email's not getting triggered daily

Hi,

I have a doubt regarding the data alert emails.

I have setup 2 alerts and set the alert frequency as once every 24 hrs. I have set the report refresh every 2 hrs. Now my doubt is, will the mails be triggered only if there is change in data in the tiles?

If so, is there any possibility to trigger the mail daily irrespective of the data change or not.

Please help me with that.

Thanks