I wrote functions to know if we are on the last day of month for someone else, here are the codes:

This indicator will tell you the number of the last traded day of the current month (save it as an indicator named “#lastdayofmonth”):

//bisextil year or not?
If Year Mod 4 = 0 And (Year Mod 100 <> 0 Or Year Mod 400 = 0) Then
IsBisextil = 1
Else
IsBisextil = 0
EndIf

//days quantity per month
if IsBisextil then
feb=29
else
feb=28
endif

//get the last day of the current month
if month=1 or month=3 or month=5 or month=7 or month=10 or month=12 then
lastdayofmonth = call "#get_lastdayofmonth"[year,month,31]
elsif month=4 or month=6 or month=8 or month=9 or month=11 then
lastdayofmonth = call "#get_lastdayofmonth"[year,month,30]
elsif month=2 then
lastdayofmonth = call "#get_lastdayofmonth"[year,month,feb]
endif

return lastdayofmonth

This code above need this other function (saved as an indicator named “#get_lastdayofmonth”).

//what is the day of week?
if myMonth >= 3 then
D = (((23*myMonth)/9) + myDay + 4 + myYear + (myYear/4) - (myYear/100) + (myYear/400) - 2) mod 7
else
z = myYear - 1
D = (((23*myMonth)/9) + myDay + 4 + myYear + (z/4) - (z/100) + (z/400) ) mod 7
endif

lastday=myDay
if D=6 then
lastday=myDay-1
elsif D=0 then
lastday=myDay-2
endif

return lastday

So in your strategy, you’ll have to code something like:

lastdayofmonth = CALL "#lastdayofmonth"

//buy the last day of the month 
if day=lastdayofmonth then 
 buy 1 contract at market 
endif 

//sell at 3rd day of the next month 
if longonmarket and day>=3 then 
 sell at market 
endif 

Hi Nicholas.

I’m interested in buying or selling at start or end of the month but have no idea how to code it right except manually enter dates. Any help possible?

P.s. tried this code but can’t get to work 🙁

If, like me, you’d forgotten how to pass parameters to indicators, this is very helpful: https://www.prorealcode.com/blog/video-tutorials/adding-dynamic-parameters-to-your-indicators-prorealtime/