How do I include EXT hours in High/Low study?

[annaie243]

input ShowTodayOnly = no;
input start         = {default rth, premarket};
input onexpansion   = no;
def ORActive = if start == start.premarket
               then if ORActive[1] == 0 and
                       GetYYYYMMDD() != GetYYYYMMDD()[1]
                    then 1
                       else if ORActive[1] == 1 and
                               GetTime() <= RegularTradingEnd(GetYYYYMMDD())
                    then 1
                    else 0
               else if start == start.rth and
                       GetTime() >= RegularTradingStart(GetYYYYMMDD()) and                    
                       GetTime() <= RegularTradingEnd(GetYYYYMMDD())
                    then 1                    
               else 0;

def ORHigh   = if ORHigh[1] == 0 or
                  ORActive[1] == 0 and
                  ORActive == 1
               then high
               else if ORActive and
                       high > ORHigh[1]
               then high
               else ORHigh[1];
def ORLow    = if ORLow[1] == 0 or
                  ORActive[1] == 0 and
                  ORActive == 1
               then low
               else if ORActive and
                       low < ORLow[1]
               then low
               else ORLow[1];

def ORHexp = if IsNaN(close)
             then ORHexp[1]
             else ORHigh;
def ORLexp = if IsNaN(close)
             then ORLexp[1]
             else ORLow;

plot ORH = if (ShowTodayOnly and
               GetDay() != GetLastDay()) or
               !ORActive
           then Double.NaN
           else if onexpansion and IsNaN(close)
           then ORHexp
           else if !onexpansion
           then ORHigh
           else Double.NaN;
plot ORL = if (ShowTodayOnly and
               GetDay() != GetLastDay()) or
               !ORActive
           then Double.NaN
           else if onexpansion and IsNaN(close)
           then ORLexp
           else if !onexpansion
           then ORLow
           else Double.NaN;
plot MID = if (ShowTodayOnly and
               GetDay() != GetLastDay()) or
               !ORActive
           then Double.NaN
           else (ORH - ORL)*.382 +orl;

ORH.SetDefaultColor(Color.GREEN);
ORH.SetStyle(Curve.MEDIUM_DASH);
ORH.SetLineWeight(2);
ORL.SetDefaultColor(Color.RED);
ORL.SetStyle(Curve.MEDIUM_DASH);
ORL.SetLineWeight(2);
MID.SetDefaultColor(Color.LIGHT_ORANGE);
MID.SetStyle(Curve.MEDIUM_DASH);
MID.SetLineWeight(2);

 

[BenTen]

For that, you can use the premarket high and low indicator https://usethinkscript.com/threads/...ines-for-thinkorswim.13139/page-3#post-138174