Custom Alert for Conversion Rate

Hi,

Our website suffer from conversion rate from in the past 2 days. So I decided to create an alert which should alert me if the conversion rate is drop. But on the custom alert, I only found conversions, visits to conversion, and revenue. I want to have the conversion rate, so I could react faster if there’s something happening on my site.

Is there any way to create an alert for conversion rate?
Is there any custom alert tool out there which can integrate with Matomo for this?

Thanks,
Andi