The color and settings may vary with different charting tools, but generally, if the body is green, it means that the asset closed higher than it opened. Red means that the price moved down during the measured timeframe, so the close was lower than the open.
Some chartists prefer to use black-and-white representations. So instead of using green and red, the charts represent up movements with hollow candles and down moves with black candles.
What candlestick charts don’t tell you
While candlesticks are useful in giving you a general idea of price action, they may not provide all you need for a comprehensive analysis. For instance, candlesticks don’t show in detail what happened in the interval between the open and close, only the distance between the two points (along with the highest and lowest prices).
For example, while the wicks of a candlestick do tell us the high and low of the period, they can't tell us which one happened first. Still, in most charting tools, the timeframe can be changed, allowing traders to zoom into lower timeframes for more details.
Candlestick charts can also contain a lot of market noise, especially when charting lower timeframes. The candles can change very quickly, which can make them challenging to interpret.
So far, we have discussed what is sometimes referred to as the Japanese candlestick chart. But, there are other ways to calculate candlesticks. The Heikin-Ashi Technique is one of them.
Heikin-Ashi stands for “average bar” in Japanese. Such candlestick charts rely on a modified formula that uses average price data. The main goal is to smooth out price action and filter out market noise. As such, Heikin-Ashi candles can make it easier to spot market trends, price patterns, and possible reversals.
Traders often use Heikin-Ashi candles in combination with Japanese candlesticks to avoid false signals and increase the chances of spotting market trends. Green Heikin-Ashi candles with no lower wicks generally indicate a strong uptrend, while red candles with no upper wicks may point to a strong downtrend.