% -*- texinfo -*-
% @deftypefn {Function File} {obv} = onbalvol (closeprice, vol)
% @deftypefnx {Function File} {obv} = onbalvol ([closeprice vol])
%
% Compute the on balance volume of a security based on its closing
% price (@var{closeprice}) and @var{vol}ume. They may be given as
% separate arguments or as an nx2 matrix.
%
% The output will be a column vector, and the first number in the
% output is always 0.
%
% @seealso{negvolidx, posvolidx}
% @end deftypefn