This educational script contains different examples regarding lines, linefill, labels & boxes
First part shows the use of array.new<linefill>() without first retrieving line.new() which then are put in a linefill.new()
At every start of the week a linefill.new() is added with the top line being previous Weekly high, and the bottom line being previous Weekly low, if close doesn't go above top line, or below bottom line, both lines will be made longer with 1 bar_index (line.set_x2), otherwise the lines stop, and change color