%% Calculate the Negative Volume Index for a Data Series for a Stock
% Load the file SimulatedStock.mat, which provides a timetable (TMW) for financial data for TMW stock.

load SimulatedStock.mat
volume = negvolidx(TMW);
plot(volume.Time,volume.NegativeVolume)
title('Negative Volume Index for TMW')

% Copyright 2012 The MathWorks, Inc.