Reading Candlestick Charts: MA, Bollinger Bands, MACD, KD & RSI

Concepts

Candlestick Chart Basics

Candlestick charts are the foundation of technical analysis. Each candlestick represents four price points over a given period (a daily candle covers one day, a weekly candle covers one week):

• Open: The price at the start of the period
• Close: The price at the end of the period
• High: The highest price reached during the period
• Low: The lowest price reached during the period

If the close is higher than the open, the candle is green (bullish), indicating the price rose during that period. If the close is lower, the candle is red (bearish), indicating a decline. The longer the candle "body," the larger the price movement; the longer the "wicks" (shadows), the more volatile the intraday trading was.

Main Chart Indicators: Overlaid on Candlesticks

MA (Moving Average)

A moving average takes the closing prices of the past N days, adds them up, and divides by N to draw a line. Commonly used periods include the 5-day (weekly), 20-day (monthly), 60-day (quarterly), and 240-day (annual) moving averages.

Using MAs is straightforward: when the price is above the moving average, the trend is bullish; when it drops below, the trend is weakening. A short-term MA crossing above a long-term MA is called a "golden cross" — a buy signal. The reverse is a "death cross" — a sell signal.

Moving averages also serve as support and resistance levels. When the price pulls back to a key MA (such as the quarterly or annual line), it often bounces or finds support.

Bollinger Bands

Bollinger Bands consist of three lines: the middle line is the 20-day moving average, while the upper and lower bands are set at two standard deviations above and below. The width adjusts automatically with volatility — widening when volatility is high and narrowing when it is low.

Practical tips: prices tend to pull back when touching the upper band and bounce when touching the lower band. When the bands suddenly narrow sharply (called a "squeeze"), it signals that a big move is coming — the direction is uncertain, but volatility will definitely increase.

Sub-Chart Indicators: Displayed Below the Candlesticks

MACD (Moving Average Convergence Divergence)

MACD consists of the fast line (DIF), the slow line (MACD signal), and a histogram. You do not need to memorize the formula — just remember how to use it:

• DIF crossing above the MACD line (golden cross) → bullish signal
• DIF crossing below the MACD line (death cross) → bearish signal
• Histogram turning from negative to positive → momentum strengthening
• Histogram turning from positive to negative → momentum weakening

MACD's biggest advantage is that it is not easily misled by short-term fluctuations, making it suitable for identifying medium- to long-term trends.

KD (Stochastic Oscillator)

The KD indicator oscillates between 0 and 100. The K line is the fast line, and the D line is the slow line.

• KD below 20: The stock may be oversold — a bounce could be coming
• KD above 80: The stock may be overbought — a pullback is possible
• K line crossing above D line (golden cross) → buy signal
• K line crossing below D line (death cross) → sell signal

KD reacts faster than MACD and is useful for short-term trading. However, in a strong trend, KD can remain in overbought or oversold territory for extended periods — during such times, do not trade the reversal based solely on extreme readings.

RSI (Relative Strength Index)

RSI also ranges from 0 to 100. It measures the relative strength of upward versus downward price movements over a given period.

• RSI below 30: Oversold zone — a bounce is possible
• RSI above 70: Overbought zone — a pullback is possible
• RSI "divergence" (price makes a new high but RSI does not) is an important reversal signal

Hands-On: Using CTSstock

On CTSstock's stock analysis page (/analysis/[ticker]), switch to the "Chart" tab to access the full candlestick chart.

The platform supports two types of indicator overlays:

• Main chart indicators (overlaid on candlesticks): MA Moving Averages, Bollinger Bands
• Sub-chart indicators (separate panels below the chart): MACD, KD, RSI

Recommended setups:

1. Beginner setup: MA (5/20/60-day) on the main chart + KD on the sub-chart — start by learning to read trends and overbought/oversold conditions.
2. Advanced setup: Bollinger Bands on the main chart + MACD and RSI on the sub-chart — monitor volatility ranges and momentum direction.
3. Do not enable all indicators at once: Too many lines create visual clutter. Pick 2–3 that you are most comfortable with.

FAQ

Q: Does technical analysis really work? A: Technical analysis is not a crystal ball for predicting the future — it is a tool for organizing market information and improving your odds. Its greatest value lies in providing clear entry and exit discipline, preventing emotional buying and selling. It works best when combined with fundamental analysis.

Q: What if these indicators contradict each other? A: This happens often. For example, KD may signal overbought (sell), while MACD is still bullish. In such cases, prioritize longer-term indicators (MACD first) and use shorter-term indicators as secondary references. The more indicators that simultaneously give the same signal, the more reliable it is.

Q: Should I make investment decisions based solely on technical analysis? A: Not recommended. Technical analysis is best suited for determining when to buy or sell, but what to buy should be guided by fundamental analysis. The ideal approach is to first use fundamentals to identify quality companies, then use technical analysis to find the right entry point.