Returns the price corresponding to the middle of the candelstick body. This price can be calculated as
(open + close)/2.
plot CandleBodyTop = MidBodyVal() + 0.5 * BodyHeight();
plot CandleBodyBottom = MidBodyVal() - 0.5 * BodyHeight();
This script plots two lines: the first one connecting all the candle body tops and the second one connecting all the candle body bottoms.