As of version 10.3.13, the only way to accomplish this is by adding a Price Band indicator to the chart. However, the method described below makes this very easy.
- Import the Thickwicks Chart Definition (external link removed)
- Drag and drop the light gray bars/wicks seen in the imported chart to any other chart for which you would like to make the wicks wider (2 pixels).
- To change the color of the thicker wicks, double-click in the chart and then double-click on the "Bands:TW_High" entry found in the resulting list. Change the light gray color in the Bands preferences to the color of your choice.
- You can repeat this process for any chart for which you'd like to widen the wicks.