This script calculates SPX value during off trading hours, including overnight after the afterhours (before the pre hours of trading), based on value of ES1!
Script is intended to be used only with ES1! ticker, for now and timeframes up to 120 minutes.
It draws a line of ES1! price at NYSE previous day's closing time (4pm NY time) and displays change since that moment and caluclates spx value based on these data.
Also it can draw a previous week's closing line as well.
Whoever wants to improve this script is more than welcome to do it.
I just did it to be enough for what I needed it.