The tutorial 186 indicator from @markplex checks for inside bars and outside bars and then plots the high and the low of the pattern until either line is breached by price. The other line continues to be plotted (i.e if the price goes below the low line, it is stopped but the high line continues to be drawn.)
An 'inside bar' is a two-bar pattern in which the inside bar is smaller and within the high to low range of the previous bar, i.e. the high is lower than the previous bar’s high, and the low is higher than the previous bar’s low.
An 'outside bar' where the bar needs to have a higher high and a lower low than the previous candlestick. When the current bar has a higher high and a low low it is completely ‘outside' the previous candlestick.
Visit the tutorial page here: https://markplex.com/free-tutorials/tutorial-186-inside-and-outside-bar-lines/
