Determine Previous Trading Day Number

[VP7]

Hello,
I'm looking to develop a function that gets the previous trading day function. The function GetDay() will get today's day number (ex. 172). However, GetDay()-1 won't necessarily get the previous trading day. For example, if today is Sunday, GetDay()-1 will return the number for Saturday and not Friday. I've attached an example where the day numbers are labeled.

Requirements:

• the function should get the previous trading day, regardless of the distance between days. For example, if there's a 3 day weekend, the function should account for that.
• the function should be not be based on hard coded values. For example, it can't say "if !GetDay() then if !GetDay()-1 else if !GetDay()-2 else..."

Thank you

 

[VP7]

Hello,
I'm looking to develop a function that gets the previous trading day function. The function GetDay() will get today's day number (ex. 172). However, GetDay()-1 won't necessarily get the previous trading day. For example, if today is Sunday, GetDay()-1 will return the number for Saturday and not Friday. I've attached an example where the day numbers are labeled.

Requirements:

• the function should get the previous trading day, regardless of the distance between days. For example, if there's a 3 day weekend, the function should account for that.
• the function should be not be based on hard coded values. For example, it can't say "if !GetDay() then if !GetDay()-1 else if !GetDay()-2 else..."

Thank you

I think I may have solved my own issue. For anyone else that's interested, here's how I solved it.

def dayNum = GetDay();
#prevDayNum is the day number for the previous trading day.
def prevDayNum = if dayNum[1] != dayNum then dayNum[1] else prevDayNum[1];