Losing feeds

I’m experiencing strange problems whit feeds on my emoncms.org monitor.
Under Setup>Feeds all feeds are updated regularly.
Now focus on Node 23 with Id 98823 and 98824: there are only few data displayed and quality is very low

What can be?

Thank you.

Hello Matteo, try ticking the average box in the graph view and then reload.
I think the problem is due to choosing too high an data saving interval when you created the feed. If your posting at 60s and the feed was created with an interval of 10s then there are a lot of empty values written to disk. The average function returns the average across a number of valid and empty entries resulting in a more representative graph of what is the underlying data is.

OK, understood.
Thank you for your support.