An outside day/period/bar is a two-bar pattern consisting of an open and a close that create a
range that's above and below the prior day's/period/bar open/close range, and a higher high AND a lower low on the second day/period/bar compared to the first bar. True outside days/period/bar also require intraday movement from the open to the close of the two days/periods/bars that is pointed in opposite directions (meaning one bar consists of a close above the open, and the other bar consists of a close below the open).
Source:
https://www.bigtrends.com/education/outside-day-technical-analysis-chart-pattern/
See also:
Inside Bar
