If you have contineous period without time table is it still possible to fast and pray during the month of Ramadan?

Ramadan Mubarak!

Regardless of how long your menstruation cycle is, you cannot participate in Ramadan during your menstruation.

Here is a website with a great deal of information for you.
http://muslimmatters.org/2011/08/03/a-womens-guide-to-spirituality-in-ramadan-during-menstruation-and-postnatal-bleeding/