The MACD Signal Candle indicator changes color according to the MACD trends.

Colored Candles, based on MACD.

HOW IT WORKS

For a Buy: 

-If the indicator is above zero, the market is bullish.

-If the market is bullish, you can take a stand with green candle signals.

For a Sell:

-If the indicator is below zero, the market is bearish.

-If the market is bearish, you can take a stand with the red candles.