Script calculates & displays the average price of two selected points. Request from @Bosstradamus3 on Twitter. This is a quick & dirty script that should be updated in the future. If you use it and/or modify it, I'd love to hear about it.
Once the indicator is selected, click & drag the label base to reset starting & ending points. To display label on top of bars, right click on it & select "Visual Order" → "Move to Front."