Clear Bar - pro real time formula

//Stock & Commodities, september 2010 : Getting Clear with Short-term Swings

for i=1 to n do
    if low > high [i] then
        cb=i
    elsif high < low [i] then
        cb=-i
    endif
next
return cb

variabile: n.
Di default (letteratura) n = 25; consigliato n =15 o meglio 13Any source