this candle represents two ideas. The first that at open many intuitive investors purchased the stock at premium price, at which point (2) many greedy, not so smart piggies decided to borrow and continue their short.. The cause and effect of this as you can see i the candle will be represented at the end of the day by perhaps a thin margin doji or high hammer indicating that short sellers realized their mistake and begin covering their positions creating a parabolic effect.