how to color signal bars?

Hello, i have been following the forum for a while, but this is my first post

I wondered if anyone could help me, is there anyway i can change the color of my bars automatically? To be used to easily identify particular bar

I would like to keep my standard bars green but create signal bars, have blue bars when opens in bottom 33% and close in top 33% of bar. And a red bar (open in top 33% and close is bottom 33%)

Is this possible with MT4?

Thanks