You could try and display both of the values in the same tooltip: https://snippet.webix.com/qhw74nt8.
Unfortunately, it seems that for the stackedBar
chart type the label
property will display the values inside the bars (https://snippet.webix.com/qnlp61j8), not on top of them as it is the case with the normal bar chart: https://snippet.webix.com/gz36ai4k. So I’m not really sure if it is possible to do this with a stackedBar
chart. As for the xAxis tooltip, I’m not sure this is possible either.
As an alternative, I suggest you look towards 3-rd party chart libraries, it is possible to integrate some of them into Webix without any issues. As a suggestion, Highcharts.js looks like it would have the functionality you need. Please note, that you would need to get the relevant library from our GitHub.