In general, a green candlestick means the close price is above the open price (price went up from open to close) and a red candlestick means than the close price was below the open price.
Most charting software lets you manually play with the colors, so be aware that you can find some really oddly colored candles from time to time.
I am a newbie.Can anyone explain why there's 2 colors in candlestick. What does green and red colors mean