A trader can set a baseline below 27 if it is a less volatile stock.
Calculation:
Take the 9-period EMA over and an exponential moving average of this average. Then sum the ratio of the two over a given number of days, usually 25
Mass = Sum[ 25 ] of EMA[ 9 ] of ( high - low ) / EMA[ 9 ] of EMA[ 9 ] of ( high - low )