A chart pattern of the bears which is made by two declines separated by a brief consolidating retracement period is called a Bear Flag.
The flagpole creates a vertically price drop due to blindside of the bulls from the sellers, then a bounce that has parallel upper and lower trendlines, which form the flag.
The starting sell off ends through some profit gaining and makes higher lows and higher highs to form a tight range

It shows that despite of entry of traders with long positions seeking a reversal a pressure of sales still exists. In this way the prices flows in an upward direction.
The traders must be ready for an action during consolidation. The price should break down through a lower range level and/or should form a new low which shows that bears are in control again for taking action for another sell-off.
When the lower trend line is broken, sellers get panic as the down trend starts another leg down.
The success of the bear flag may be greater after a significant decrease due to a possible increase in overhead resistance.
Bear flags can be strong when the pattern that Swing Low starts is also reduced all the time due to possible lack of basic support.
The bull flag is an inverted version of the bear flag.