A Kangaroo Tail is a candle with a very long tail at one end,...

A Kangaroo Tail is a candle with a very long tail at one end, sticking either up or down out of a pattern. This feature acts as a reversal signal, where the price action leaps in the opposite direction of the tail.

In an uptrend with a long-tailed candle sticking straight up is likely to signal the reversal of the trend into a downtrend in the short term. Same goes for a tail sticking down after a downtrend - likely to signal an impending upswing. A kangaroo tail is rare on a weekly chart.

BOL has a tail sticking down, signaling a possible uptrend.