I am currently using an event resource in a NOC view which displays the last 50 events. Is there any way to create a resource that displays the last 50 events that occurred in the last x hours?
Yes, we have this 'Last 250 Events' report from Orion Report Writer. Run the report writer on your server and open it. You can edit the time frame of that report, let's say 'Last 2 Hours'. Also the number of records you want to display, like 10, 50 or 250, then save the report.
Go back to your NOC view and add the resource called 'Report from Orion Report Writer'. Select the 'Last 250 Events'. It will display you the x of events that occurred for last x hours.
I hope this helps.