Tutorial (Financial Toolbox)

Financial Toolbox

Bollinger Chart Example

Next the Financial Toolbox bolling function produces a Bollinger band chart using all the closing prices in the same IBM stock price matrix. A Bollinger band chart plots actual data along with three other bands of data. The upper band is two standard deviations above a moving average; the lower band is two standard deviations below that moving average; and the middle band is the moving average itself. This example uses a 15-day moving average.

Assuming the previous IBM data is still loaded, simply execute the Financial Toolbox function.

```
bolling(ibm(:,4), 15, 0);
```

Specify the axes, labels, and titles. Again, use dateaxis to add the x-axis dates.

axis([0 ro min(ibm(:,4)) max(ibm(:,4))]);
ylabel('Price ($)');
title(['International Business Machines']);
dateaxis('x', 6,'31-Dec-1994')

.

For help using MATLAB plotting functions, see Creating Plots" in the MATLAB documentation. See the MATLAB documentation for details on the axis, title, xlabel, and ylabel functions.

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