The formation of a large topping tail on a candle suggests that the price is likely to reverse and decline, and it is improbable that it will retest its recent high.
"That tells us that yes, the price squeezed up, but then sellers pushed it right back down and this is probably going to reverse and come down lower because a short is going to look at this and think, well, you know, this thing it probably open more like this, but this thing is probably not going to retest the high because everyone's going to look at this candle and see that it's negative. It's bearish."