This pattern is the reverse version of the three Inside Up pattern.
The Three Inside Down pattern starts with a green candle.
It is followed by a short red candle, and its body does not go beyond the body of the first green.
The third candle is also red, and its closing price is lower than the previous red one.
The Three Inside Down pattern is an extended version of the Bearish Harami pattern. As a rule, Three Inside Down confirms a bearish trend reversal, and the price begins to decline after growth.