Same level, different colors. When you see yellow candle on the same level as white one - this is bullish conditions. When you see white on the same level, this is bear conditions easy to be seen.
I think maybe this idea may work better with Canadian and New Zealand dollars as they move up and down like a tall whore's draws more than most. While other currencies get fucked so often that they don't even get to pull the draws up all the way. lol