When attaching the indicator to your chart in the MetaTrader 4 trading platform, you have to choose time / price range that will be used for calculations of the Market Profile indicator. Every time you will attach the Market Profile indicator into your chart, it will create the rectangle highlighting the price / time range used for calculations. To resize it, use the middle point of the rectangle (highlighted in the picture below) and simply drag it to left or right. As soon as you will move with the middle point of the rectangle, the indicator should get updated and resize the rectangle based on a price range that you would like to analyze. If it doesn't, simply right-click in your chart and choose "Refresh".
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