Trigger when NiftyBees is 1% down

If you want to compare against the previous day’s market close, then you can try -

DayChangePercent('NSE:NIFTYBEES') >= 1

Or, if you want to compare against today’s market open, then you can try -

IntraDayChangePercent('NSE:NIFTYBEES') >= 1

This will generate an alert if NiftyBees goes up/down 1%. It is not possible in Sentinel to select the direction of the move (clarified in a different thread by Zerodha staff)