Graph IT! uses a series of formulas derived from the previous highs, lows, and closes. It has been used successfully with stocks, mutual funds, and the futures/commodity market. The time period graphed is completely flexible to the type of trading you are doing. For example, if you day trade in the commodity wheat, you could set up the time frame from the beginning of the trade day at 10:30am and run through 2:15pm, the close of wheat trading and plot your pricing data in 30 minute intervals. You are also able to plot a particular stock on a daily basis or even a weekly basis.