Auto-square off means when the system (Dhan in this case) or the Risk team at Dhan squares off of your open intraday position. The square off time for intraday positions for all the segments are given below :

 

SegmentsSquare Off Time
NSE/BSE Cash, Derivatives3:20 PM
Currency4:45 PM
Commodity11:15 PM for 11:30 PM, 11:45 PM for 11:55 PM Market Closing