float yHiRect = chartScale.GetYByValue(firstPrice);
float yLoRect = chartScale.GetYByValue(lastPrice);
SharpDX.RectangleF MgDrect = new SharpDX.RectangleF( ????, yLoRect, 10000, yHiRect-yLoRect);
RenderTarget.FillRectangle(MgDrect,bandsBrush);
Thanks for you help
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