Simple Currency Strength Measurer IV

Version IV of the SCSM, this time thanks to SAACI I learned more about the financial markets and some math stuff. This time I switched the formula a bit to use Zscores:
(close-sma(close,shortma))/stdev(close,dev)

This creates a nice oscillator like view, if you overlay TWO of them, one longer and one shorter you can get almost perfect absolute highs and absolute lows. Enjoy.