CheckDate() =>
    D1 = input(true,"Mon",group="Trading Days of week",inline='d')
    D2 = input(true,"Tue",group="Trading Days of week",inline='d')
    D3 = input(true,"Wed",group="Trading Days of week",inline='d')
    D4 = input(true,"Thu",group="Trading Days of week",inline='d')
    D5 = input(true,"Fri",group="Trading Days of week",inline='d')
    D6 = input(true,"Sat",group="Trading Days of week",inline='d')
    D7 = input(true,"Sun",group="Trading Days of week",inline='d')

    DateOK = true

    if D1 == false
        if dayofweek == dayofweek.monday
            DateOK := false
    if D2 == false
        if dayofweek == dayofweek.tuesday
            DateOK := false
    if D3 == false
        if dayofweek == dayofweek.wednesday
            DateOK := false
    if D4 == false
        if dayofweek == dayofweek.thursday
            DateOK := false
    if D5 == false
        if dayofweek == dayofweek.friday
            DateOK := false
    if D6 == false
        if dayofweek == dayofweek.saturday
            DateOK := false
    if D7 == false
        if dayofweek == dayofweek.sunday
            DateOK := false
    DateOK