I would like to create a QCustomPlot that has a range of time on the y-axis. I am running a prediction algorithm that will determine that something will happen in x - seconds. I would like for this plot to graph a point on the x- axis but not have a set y-axis value. Ideally it would plot a straight line up to infinity, or the range of the graph starting at the point on the x-axis determined by the prediction. I could not find any implementations of this, or documentation that looked like it would be useful. Is this something that's possible to do with QCustomPlot? If so could someone point me in the right direction as to how to implement this? Thanks in advance.