How to draw a vertical due line on the line and clustered column chart

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I have line and clustered column chart，I want to draw a vertical expiry line (like the leftmost line) when the value of the line chart reaches 0，What should I do? thanks!

[AmiraBedh · Accepted solution]

Try to create a table with only the data points where the line reaches 0. If you are dealing with time series data, you would identify the dates where the line hits 0.