In technical analysis, it's one of the most popular triangle price formations that falls under the category of continuation patterns. However, as the name suggests, it can be traded both ways.
The price action needs to move in a series of lower highs and higher lows in order to be able to define a triangle.
In terms of its characteristics, you need only look for two things:
An ascending bottom trendline that goes in the upwards direction.
A descending top trendline that goes in the downward direction.