Computerized Investing > July/August 2006

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Where can I find the standard deviation of an individual stock’s price over a period of time?


Figure 1.
CI Editor Responds: The StockCharts Web site ( allows you to plot the standard deviation of a stock. The figure below shows a one-year daily price chart for IBM with the standard deviation plotted on the top of the chart. To plot the standard deviation, create a Sharp Chart for the desired ticker. You can then adjust the timeframe and select standard deviation from the Indicators area. Users can plot daily charts for up to three years at no cost. Subscriptions to, which offer longer charting periods, more indicators, and advanced features such as technical screening, begin at $9.95 per month.

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