def _differentiate_radar_chart_type(cls, plot):
        radarChart = plot._element
        radar_style = radarChart.xpath("c:radarStyle")[0].get("val")

        def noMarkers():
            matches = radarChart.xpath("c:ser/c:marker/c:symbol")
            if matches and matches[0].get("val") == "none":
                return True
            return False

        if radar_style is None:
            return XL.RADAR
        if radar_style == "filled":
            return XL.RADAR_FILLED
        if noMarkers():
            return XL.RADAR
        return XL.RADAR_MARKERS