calendar from where we can get importance or eventually some other data like http://www.forexfactory.com/calendar.php

Did you try the custom indicator someone made called DailyFxNews?
It can be set to show only news relevant to the pair you are on, or all news, but doesnt show the actual numeric result of the event.

can be downloaded at: /algos/indicators/show/431

I'm not really interested in the forecast, but a holiday calendar would be great. Bots have no idea when the market is closing, and would be good to code in to start closing up positions a couple of days before a holiday starts.