This is really a very useful indicator for price action traders who are watching the key areas for potentially high probable trade setups. This script can be applied to see the pre-market highs and lows for stocks, also today's high/lows, yesterday's highs/lows and after hours highs/lows too.
You also have the option to turn on/off the highs/lows in the settings.
Any questions, let me know. Always happy to help.
Thank you!