This code snippet demonstrates how to implement conditional logic based on the day of the week to decide whether to trade or not in the ProBuilder language. The logic is designed to exclude specific days from trading based on user-defined conditions.

if workday then
    if dayofweek = 0 then // 0 to trade; 1 to exclude monday
        weekday = 0
    elsif dayofweek = 0 then // 0 to trade; 2 to exclude tuesday
        weekday = 0
    elsif dayofweek = 0 then // 0 to trade; 3 to exclude wednesday
        weekday = 0
    elsif dayofweek = 0 then // 0 to trade; 4 to exclude thursday
        weekday = 0
    elsif dayofweek = 0 then // 0 to trade; 5 to exclude friday
        weekday = 0
    else
        weekday = 1
    endif
endif

Explanation of the code:

• The code starts with a conditional check if workday to determine if the current day is a working day. This is a placeholder and should be defined elsewhere in your code or settings.
• Within this block, a series of conditional checks are performed using elsif statements to evaluate the dayofweek variable. Each condition checks if the dayofweek equals a specific value (which should be the day of the week represented as an integer).
• For each day, there is a comment indicating whether the day should be included in trading (0) or excluded (1-5). However, there seems to be a mistake in the code as all conditions check for dayofweek = 0. This should be corrected to match the respective day indices (e.g., 0 for Monday, 1 for Tuesday, etc.).
• If none of the conditions are met, the weekday variable is set to 1, likely indicating a non-trading day.
• The code is structured to easily allow modifications to include or exclude specific trading days by adjusting the conditions and the corresponding comments.

This snippet is useful for strategies that require disabling trading on certain days of the week, potentially based on historical performance data or external factors.