Display shading only during pre-market

This topic has already been covered previously in the forum. I have updated the title of your question to make this post easier to locate using the search function.

Here is a link to that previous post:

https://www.hahn-tech.com/ans/how-do-i-change-the-background-color-based-on-time-of-day/

Here is the core section of code which makes this work. I have adjusted the time inputs to fit the specific times you requested, when the chart is set to Eastern timezone.

input alertPeriodStart = 400;
input alertPeriodEnd = 930;
def startCounter = SecondsFromTime(alertPeriodStart);
def endCounter = SecondsTillTime(alertPeriodEnd);
def alertPeriod = if startCounter >= 0 and endCounter >= 0
then 1 else 0;

And here is how we fold that section of code into your existing solution:

input percentThresholdTop = 50.0;
input percentThresholdBottom = 30.0;
input alertPeriodStart = 400;
input alertPeriodEnd = 930;
def startCounter = SecondsFromTime(alertPeriodStart);
def endCounter = SecondsTillTime(alertPeriodEnd);
def alertPeriod = if startCounter >= 0 and endCounter >= 0
then 1 else 0;
DefineGlobalColor(“shading”, Color.GREEN);
def previousDailyClose = close(period = “DAY”)[1];
plot rangeTop = previousDailyClose + (previousDailyClose * percentThresholdTop * 0.01);
rangeTop.SetPaintingStrategy(PaintingStrategy.HORIZONTAL);
rangeTop.AssignValueColor(GlobalColor(“shading”));
plot rangeBottom = previousDailyClose + (previousDailyClose * percentThresholdBottom * 0.01);
rangeBottom.SetPaintingStrategy(PaintingStrategy.HORIZONTAL);
rangeBottom.AssignValueColor(GlobalColor(“shading”));
AddCloud(if alertPeriod then rangeTop else Double.NaN, if alertPeriod then rangeBottom else Double.NaN, GlobalColor(“shading”), GlobalColor(“shading”));

Note that I have updated the variable name for the previous daily close. You had assigned it to a variable named "close" which is bad form because "close" is a key word. When writing code we must be very careful to avoid using key words and function names as variable names.

This solution impacts the shaded area, but it does not change the horizontal lines that plot on the top and bottom of your custom range. You can work out that part, given the example I have applied to the AddCloud() statement.