```
# firstlast_barofday_mod01
# mod - find a bar after the first bar
# GetDayValues
# Author: Kory Gill, @korygill
#
# VERSION HISTORY (sortable date and time (your local time is fine), and your initials
# 20190823-1400-KG - Created.
# ...
declare hide_on_daily;
declare once_per_bar;
input onUpper = yes;
# logic
#
def nan = Double.NaN;
def isRollover = GetYYYYMMDD() != GetYYYYMMDD()[1];
def beforeStart = GetTime() < RegularTradingStart(GetYYYYMMDD());
def afterEnd = GetTime() > RegularTradingEnd(GetYYYYMMDD());
def firstBarOfDay = if (beforeStart[1] == 1 and beforeStart == 0) or (isRollover and beforeStart == 0) then 1 else 0;
def lastBarOfDay = if
(afterEnd[-1] == 1 and afterEnd == 0) or
(isRollover[-1] and firstBarOfDay[-1])
then 1
else 0;
#
# Identify first bar of day and last bar of day on chart
#
AddChartBubble(
firstBarOfDay and onUpper,
close,
"First Bar of Day",
Color.GREEN,
yes);
AddChartBubble(
lastBarOfDay and onUpper,
close,
"Last Bar of Day",
Color.GREEN,
no);
#
# plots
#
plot p1 = if !onUpper then isRollover else nan;
plot p2 = if !onUpper then beforeStart else nan;
plot p3 = if !onUpper then afterEnd else nan;
plot p4 = if !onUpper then firstBarOfDay else nan;
plot p5 = if !onUpper then lastBarOfDay else nan;
p1.SetDefaultColor(GetColor(1));
p2.SetDefaultColor(GetColor(2));
p3.SetDefaultColor(GetColor(3));
p4.SetDefaultColor(GetColor(4));
p5.SetDefaultColor(GetColor(5));
AddLabel(!onUpper, "isRollOver", GetColor(1));
AddLabel(!onUpper, "beforeStart", GetColor(2));
AddLabel(!onUpper, "afterEnd", GetColor(3));
AddLabel(!onUpper, "firstBarOfDay", GetColor(4));
AddLabel(!onUpper, "lastBarOfDay", GetColor(5));
#
# --------------------------------------------
# find a bar after the first bar, with an offset
def na = double.nan;
input find_x_bar_of_day = 2;
def fxb = (find_x_bar_of_day - 1);
def chartagg = getAggregationPeriod();
def chartmin = (chartagg/1000)/60;
# 390 minutes in a day
def daybars = 390/chartmin;
addlabel(1, "chart min " + chartmin, color.cyan);
addlabel(1, "day bars " + daybars, color.cyan);
def fxberr = (fxb >= daybars) or (fxb < 0);
def firstbaroffset = if fxb > daybars then (daybars-1) else if fxb < 0 then 0 else fxb;
# # wrong, display a message
addlabel(fxberr, "x bar number " + fxb + ", is out of range. (0to" + (daybars -1) + ") pick another", color.cyan);
# find desired bar
plot z = if !fxberr and firstBarOfDay[firstbaroffset] then low else na;
z.SetPaintingStrategy(PaintingStrategy.ARROW_UP);
z.SetDefaultColor(Color.cyan);
z.setlineweight(3);
z.hidebubble();
# plot bar #
plot y = if !fxberr and firstBarOfDay[firstbaroffset] then (firstbaroffset + 1) else na;
y.SetPaintingStrategy(PaintingStrategy.VALUES_ABOVE);
y.SetDefaultColor(Color.light_gray);
#
```