Auto Populating Data Labels

I have a scatter plot with straight lines. Y axis is a numerical value and the X axis is a date range (see attached). I have four data series on said chart that correspond to inputted data on a daily basis. I also have a fifth data series that serves the purpose to draw a vertical line intersecting the X axis at todays date. Is there a way to auto populate data labels for each day that corresponds to the data point on each of the four data series that intersect today's date line?

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Thanks for the reply!

To hopefully add a little more detail about what I am looking to do....

The data I want to show is already embedded in the scatter plot since all of the data points are already there. I want to have excel show only a set of data labels for a given day. For example, on the included attachment, the vertical line drops down to a date of 5/9/18. That vertical line intersects four other lines (red, blue, green, black dash). Each one of those lines is composed of a scatter plot that already has data that directly correlates to the date of 5/9/18, so the data is already there. I am looking to see if I can have excel show the data labels for the four points, or the rather one data point per line that the vertical line intersects. I can easily go in a manually show the individual data labels, but I was hoping to find a way to make it happen automatically, and update automatically each day so that only four points are shown per day as the date moves forward.

Attached is an example of what I am trying to do. This example represents a manual entry to display the data labels. I would like data labels of this nature to populate automatically for each day, and only for one day (=today()) at a time.

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