What is 1 day returns?

A 1-day return shows the profitability of your current positions since the last trading day in absolute and percentage terms.

For stocks purchased today,

1D return = (Current LTP – Today’s average trade price) * Quantity

For F&O positions, your 1-day return would be net of current market price and your buying/selling average (or yesterday’s close if it is a carry-forward position).