Draw a vertical line on 20 days

[mini]

How to write a script to draw a vertical line on 20 days look back and the next 20 days from the beginning of the recent month (the first trading day of the month)? For example, the beginning of the recent month is December, how to write a script to draw a vertical line on 20 days look back and the next 20 days from this date? Thank you!

 

[SleepyZ]

How to write a script to draw a vertical line on 20 days look back and the next 20 days from the beginning of the recent month (the first trading day of the month)? For example, the beginning of the recent month is December, how to write a script to draw a vertical line on 20 days look back and the next 20 days from this date? Thank you!

Enter the number of months lookback at input month_lookback to find the date of the first trading day of the month. The current month of February would be 0, to find January, then 1 and December as your example, then 2.

Then there are 2 lookbacks of input days_lookback, one from the month_begin and then the 'next' from the first days_lookback,

input month_lookback    = 2;
input days_lookback     = 20;
input showverticallines = yes;
input showlabels        = yes;

def bn              = BarNumber();
def count           = if GetMonth() != GetMonth()[1] then count[1] + 1 else count[1];
def month_count     = HighestAll(count) - count ;
def month_begin_bar = if month_count == month_lookback and month_count[1] == month_lookback + 1
then bn else Double.NaN;

AddVerticalLine(bn == HighestAll(month_begin_bar),
                GetMonth() + "/" + GetDayOfMonth(GetYYYYMMDD()) + "/" + GetYear(), Color.YELLOW);

def days_back_1 = HighestAll(month_begin_bar) - days_lookback;
AddVerticalLine(bn == days_back_1,
                GetMonth() + "/" + GetDayOfMonth(GetYYYYMMDD()) + "/" + GetYear(), Color.WHITE);

def days_back_2 = days_back_1 - days_lookback;
AddVerticalLine(bn == days_back_2,
                GetMonth() + "/" + GetDayOfMonth(GetYYYYMMDD()) + "/" + GetYear(), Color.YELLOW);

AddLabel(showlabels, "Date Begin: " +
AsPrice(HighestAll(if bn == HighestAll(month_begin_bar) then GetYYYYMMDD() else Double.NaN)), Color.YELLOW);

AddLabel(showlabels,
days_lookback + " Days Before Date Begin: " +
AsPrice(HighestAll(if bn == days_back_1 then GetYYYYMMDD() else Double.NaN)), Color.WHITE);

AddLabel(showlabels,
days_lookback + " Days Before 1st Days Lookback: " +
AsPrice(HighestAll(if bn == days_back_2 then GetYYYYMMDD() else Double.NaN)), Color.YELLOW);

;