Alert when there is deflection in chart

Hi @Animesh M. which plan is your org on? Enterprise and Growth plan orgs that have purchased the Insights Add-on have access to custom monitors. You can set up the custom monitor on a saved chart and subscribe your email to the alert. 

Here is the help doc to set this up: https://help.amplitude.com/hc/en-us/articles/115001764612-Insights-Spot-anomalies-in-your-metrics-quickly-with-alerts

When setting up the custom monitor, be sure to check out the preview option to review how noisy the alert might be.

There are also webhooks for custom monitors that you could subscribe a slack channel to.   https://help.amplitude.com/hc/en-us/articles/360055808391-Webhooks-for-custom-monitors