On Raindrop Charts, the color of a Raindrop depends on the relative position of the Left and Right mean (VWAP) prices to each other. The logic is similar to Japanese Candlesticks or Bars: It’s red if Right is less than Left, and green if Right is greater than Left.
Unlike other charts, there is a particular special case worth noting in Raindrop Charts when the VWAP price of each side of the Raindrop happen to be equal (or approximately equal; see more below).
We call this type of Raindrop a Blue Doji Raindrop:
As I mentioned, we believe this Raindrop is very special.