I want to share with all the comunity a widget I have developed (WAB 2.6); create graphs of your map services on the fly usingCedar. You can select the available layers in the Web Map. Choose, for the 'x' axis, the field you want to show information, repeat the procedure for the 'y' axis. Select the type of graphic, bars or horizontal bars. The widget is ready to filter the data by extension (by activating the check button). Inside the container of the widget, the graphic will be updated being this responsive.