Hi Team, for the metrics displayed in Service tab, I'd like to know whether I can create alerts based on these metrics. If not, what are the internal queries of these graphs? Are they documented?

Did you get a chance to go through these? https://signoz.io/docs/alerts-management/metrics-based-alerts/

Yes I did, however I was still having trouble producing the "Error Percentage" metric, I would like to know how you calculated this value.

how did you figure that out

I was not sure about how to calculate the "External Call Error Percentage", then I checked the source code to find out the metric "Signoz_external_call_latency_count" was used and the formula was ("Signoz_external_call_latency_count" that has "status_code_error" divided by all "Signoz_external_call_latency_count" ), correct?

Yes

Thank you for confirming.