Tracing trends in negative and positive mentions is absolutely possible with Netvibes’ Dashboard of Things.
To create a potion to trace trends in negative and positive mentions you need to start by creating a “What is said?” app tracking negative or positive mentions.
Search for your brand or topic and using Netvibes’ Universal Search Syntax to only monitor mentions with a certain emotion - “emotion:negative” or “emotion:positive”
and create a “What is said?” app.
Next step is to click on the “Settings” of the app and click “Potion”. This will take you to a screen to configure the trigger settings