This script is meant for stocks that have a pre-market session. It is meant to be used on the 1 min time frame. This script will draw a green line at the high of pre-market, and a red line at the low of pre-market and extend these lines across the regular session day
This makes it easy to see if price action during regular market has broken above pre-market high or broken below pre-market low.
The high/low skips any quick spikes in price action (similar to what happens at 8:30 am every day).