This script is helping you auto plot daily SMA EMA and extensions when you are looking at intraday charts. The script is customizable where user can select which ever levels they are interested in viewing. These daily lines act as support and resistance levels for intraday
The green line represent 20 EMA Daily The yellow line represent 50 SMA Daily The olive line represent 200 SMA Daily
The red line is upper Bollinger Band Daily The black line is lower Bollinger Band Daily
To help you understand which lines are what I would recommend you add this indicator and select "D" timeframe and then see which lines you would like to view for your 1min chart or 5 min chart you can customize from the setting options which plot color you would like to view.