I reckon an even better resource than Google for MS formulas is the MS User Manual that comes with the application! Read the instructions from cover to cover, then read it again. Then, download the free Equis Formula Primer and work through the exercises contained therein. In no time, you will be your own code guru!
In the mean time, try this; in the explorer filter, add the following code:
Make sure to load at least 100 bars of data when you run this exploration (or more, just to be on the safe side)
Hope this helps.