This habit shows the differences in your behaviour at different times of the day. Are you better at market open? Close? Or in quieter times?
The markets change substantially during the day including market opens, lunchtime lulls and market closes. Separately, you might be a morning person or an evening person. It’s worth knowing when your best times are, and to try and free up the best times for your trading.
Try matching your lifestyle to your best and worst times. Are there times of the day when you are unfocused, distracted, overtired? Learn to figure out how your schedule outside of trading is impacting your trading outcomes.