Movable crosshair on chart with mouseover event

I have an XY scatter plot and I'd like to add some vertical-horizontal lines (cross-hair) on the plot.

Is it possible since these lines could also be moved along the x & y axis and follow mouse pointer when chart activated (I guess it required mouseover event) ?
I'd like the x and y value of the data point on the curve to be displayed within the chart. The location of the data point will vary, so the system needs to be dynamic.

better explanation can be found in the attachment.