I am looking for a pretty simple indicator that can be placed on the chart. It will be used to measure the distance (in ticks) between two lines, which are movable. Something like this:

The number of ticks between the lines is then displayed somewhere on the screen.

Anyone knows where I can find such an indicator?

Does it have to be an indicator or will the Ruler under drawing tools (Ctl-F3) suffice? Ruler may be NT7 only...