Technical Indicator

Technical indicators help traders understand how a security’s price, momentum, volume, or volatility is changing based on historical market data. They are commonly used as part of technical analysis to identify possible trends and trading signals.

• Technical indicators may use price, volume, open interest, or a combination of these data points.
• Common examples include MACD, RSI, Bollinger Bands, ADX, and OBV.
• Oscillators usually move within a range, while overlays are plotted directly on the price chart.
• Support and resistance levels can help identify areas where buying or selling pressure may increase.
• Technical indicators do not guarantee future price movements, so traders may use several indicators and chart-analysis tools together.
   

A technical indicator is a mathematical calculation or chart-based tool used in technical analysis. It is usually based on historical data such as price, trading volume, or open interest.
Technical indicators can be used for securities such as equity shares, options contracts, and currencies. They help traders study patterns and understand how price or market momentum may be changing.
For example, an indicator may show that buying momentum is increasing or that a stock is experiencing unusually high volatility. However, this does not guarantee that the price will move in a particular direction.
 

Technical indicators analyse historical market data such as prices, trading volume, and open interest. The calculations may appear as numbers, lines, bands, or other signals on a price chart.
Traders interpret these signals using established rules to identify possible trends, momentum changes, or price reversals. For example, a moving average may help show whether prices have generally been rising or falling over a particular period.
However, technical indicators cannot reliably predict future prices on their own. They are based on historical information, and past price movements do not guarantee similar movements in the future.
For this reason, traders may use more than one technical indicator along with candlestick charts and other analysis tools before making trading decisions.
 

Based on how they are calculated and displayed, technical indicators can generally be grouped into two categories.

Oscillators

Oscillators move within a range or around a central level and are generally displayed above or below the main price chart. They can help traders study momentum and identify possible changes in market conditions.

Common examples include:

• Moving Average Convergence Divergence (MACD)
• Relative Strength Index (RSI)
• Stochastic oscillator

For example, the RSI moves between 0 and 100, making it easier to compare the strength of recent price gains and losses.

Overlays

Overlay indicators are displayed directly on the price chart, usually alongside the price of the security being analysed.

Common examples include:

• Moving averages
• Bollinger Bands

Support and resistance levels are also commonly plotted directly on price charts, although they are generally considered technical analysis levels rather than mathematical indicators.

If you trade with a short-term market outlook, technical indicators can help you study factors such as trend direction, momentum, and volatility. Some commonly used indicators and technical analysis tools are explained below.

Support and resistance

Support and resistance are price levels used in technical analysis to identify areas where buying or selling pressure may increase.

A support level is an area where buying interest may help prevent the price from falling further. A resistance level is an area where selling pressure may make it difficult for the price to rise further.

For example, if a stock repeatedly falls close to ₹500 and then moves upward, traders may view ₹500 as a possible support level. These levels can also be used to observe potential breakouts, but they do not guarantee how prices will move.

Moving Average Convergence Divergence (MACD)

The Moving Average Convergence Divergence, or MACD, is a momentum indicator commonly used to study trends.

The standard MACD calculation uses:

• 12-period EMA: Shorter-term exponential moving average
• 26-period EMA: Longer-term exponential moving average
• 9-period EMA: Signal line calculated from the MACD line

The MACD line is generally calculated by subtracting the 26-period EMA from the 12-period EMA. A signal line is then calculated as a 9-period EMA of the MACD line.

When the MACD line crosses above the signal line, it may be considered a bullish signal. When it crosses below the signal line, it may be considered a bearish signal.

For example, if the MACD line moves from below the signal line to above it, this may suggest that upward momentum is strengthening. It should still be considered along with other market information.

Bollinger Bands

Bollinger Bands can help you study price volatility. They consist of three bands:

• A middle band, generally based on a Simple Moving Average (SMA)
• An upper band
• A lower band

When the bands become narrower, volatility is generally lower. When they become wider, volatility is generally higher.

A price near or beyond the upper or lower band may show that the security has moved relatively far from its recent average. However, touching a Bollinger Band does not by itself confirm that a security is overbought or oversold.

Relative Strength Index (RSI)

The Relative Strength Index, or RSI, is a momentum indicator that measures the speed and magnitude of recent price movements.

RSI range: 0 to 100

Traditionally:

These levels are guidelines rather than guaranteed trading signals. During a strong trend, the RSI can remain above 70 or below 30 for an extended period.

For example, an RSI above 70 may indicate strong recent buying momentum, but it does not necessarily mean that the price will immediately fall.

Average Directional Index (ADX)

The Average Directional Index, or ADX, is used to measure the strength of a trend. It focuses on how strong the trend is rather than whether prices are moving upward or downward.

ADX range: 0 to 100

The values are commonly interpreted as follows:

For example, if another indicator suggests an upward trend and the ADX is above 25, the ADX may indicate that the trend has some strength. It does not, however, tell you whether the trend is upward or downward.

On-Balance Volume (OBV)

On-Balance Volume, or OBV, is a technical indicator that uses trading volume to study buying and selling pressure.

Instead of focusing only on the absolute OBV value, traders generally look at the direction in which it is moving.

For example:

Rising prices along with rising OBV may support an upward trend.

Falling prices along with falling OBV may support a downward trend.

Differences between price movements and OBV movements may also be studied for possible changes in momentum. However, OBV should not be treated as a guaranteed indication of future price direction.

Technical indicators help you study price trends, momentum, volatility, and trading volume using historical market data. Common examples include MACD, Bollinger Bands, RSI, ADX, and OBV, while tools such as support and resistance can provide additional chart context. Each indicator provides a different type of information, so relying on a single signal may not give you a complete picture. You can practise reading these indicators on simulators or demo accounts before using them in real-market decisions.