r-squared translation

["Peter E. Gialames" <investor@xxxxxxxxxxxxx>]

The following is the formula for Metastocks r-squared:

Pwr(Corr(Cum(1),C,14,0),2)

I am familiar with the 'Pwr' function but am unfamiliar with the 'Corr' and
'Cum' functions (help doesn't help much).

The way I read this is: you square the formula 'Corr(Cum(1),C,14,0)', but
have no idea how to construct the formula in mathematical terms.

Any help would be appreciated,
Peter Gialames