Value variable in alert message

tried them in the alert message filed can not the current value.
Total rentals: {${labels.Value}}.
Total rentals: {${labels.value}}.
Total rentals: {{.Value}}.
Total rentals: {{.value}}.
Total rentals: {${Value}}.
Total rentals: {${value}}.
Total rentals: {{value}}.
Total rentals: {{ $value }}.

is there a way to get the value in the alert message?

Grafana v8.2.5

it’s look like you are using the legacy alerting platform and not Unified Alerting. Is that correct @sonysadi?

handlebar templating like this should work with a multi-dimensional rule in Unified Alerting.

Yes, I am using the legacy alerting platform and not Unified Alerting.
And the Doc is not helpful about messaging templete

Legacy alerts templating is here - Alert notification templating | Grafana Labs

Thanks for the reply, I saw that old doc already,
But it does not tell how to print the gauge “value” of metrics in the notification template