From the current tendency, the color starts to go out of the yellow and ready to go to the light green, does this mean the price of bitcoin will go down again?
Possibly, but it would probably be best to ignore it. We don't have enough of a sample size to safely conclude anything.
As far as halving goes, it increases scarcity, but that doesn't mean anything if demand doesn't keep up. The halving won't be a bull run catalyst by itself, and has never been one.