Dear recepzed,
I already found a way to do that. That feature is available in notify and fitness app but it is an experimental function. Unfortunately, this feature only available in pro version. This features required 3rd Mi Band alarm usage. If you have set a 3rd alarm it will be cancelled and replaced. This is an experimental function, some false warnings may occurs. If your Mi Band Bluetooth connection isn't stable please don't use this features to avoid repeated false warnings. This is a BETA feature.