Pre-market highs and lows watchlist column

[asifa273]

Hello,

I am trying to get the preMarketHighs and preMarketLows to display in the Watchlist and make some calculated comparing it against the price of the stock. I want these values even during the regular trading hours and even when the ToS is not running during the preMarket hours. If someone has already have a code for this, please share.

Thanks,
Asif.

 

[XeoNoX]

here you go...


HIGHEST PREMARKET HIGH AS COLUMN
NOTE: * Set time Aggregation to 1 to 30 minutes *
updated to reflect updated trading hours starting at 03:00

# Highest PreMarket High price for thinkorswim column v1.0
# Request filled by XeoNoX via use thinkscript.com 12/08/2025
# https://usethinkscript.com/threads/pre-market-highs-and-lows-watchlist-column.21770/
# NOTE: *** Set time Aggregation to 1-30 minutes  ***

declare lower;

def start_time = 0300;
def endtime = 0930;
def selected_time = if GetLastDay() == GetDay() and SecondsFromTime(start_time) >= 0 and SecondsFromTime(endtime) < 0 then 1 else 0;

def hh =  if selected_time and high > hh[1] then high else hh[1];

plot PM_High=hh;

PM_High.assignValueColor( if close < PM_High then color.downtick else if close > PM_High then color.uptick else color.white);

LOWEST PREMARKET LOW AS COLUMN
NOTE: * Set time Aggregation to 1 to 30 minutes *
updated to reflect updated trading hours starting at 03:00

# Lowest PreMarket Low price for thinkorswim column v1.0
# Request filled by XeoNoX via use thinkscript.com 12/08/2025
# https://usethinkscript.com/threads/pre-market-highs-and-lows-watchlist-column.21770/
# NOTE: *** Set time Aggregation to 1-30 minutes ***

declare lower;

def start_time = 0300;
def endtime = 0930;
def selected_time = if GetLastDay() == GetDay() and SecondsFromTime(start_time) >= 0 and SecondsFromTime(endtime) <0 then 1 else 0;

def PMLow = if selected_time and !selected_time[1] then low
else if selected_time and low < PMLow[1] then low else PMLow[1];

plot LowestOfPM =PMLow;

LowestOfPM.assignValueColor( if close < LowestOfPM then color.downtick else if close > LowestOfPM then color.uptick else color.white);