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# Volume Indicators
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Indicators that analyze the relationship between price movements and trading volume to confirm trends, identify potential reversals, and validate price action. Volume analysis helps determine the strength behind price movements.
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## Capabilities
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### Chaikin A/D Line
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Accumulation/Distribution Line that combines price and volume to show how much of a security is being accumulated or distributed.
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```python { .api }
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def AD(high, low, close, volume):
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    """
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    Chaikin A/D Line
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    Parameters:
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    - high: array-like, high prices
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    - low: array-like, low prices
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    - close: array-like, close prices
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    - volume: array-like, volume data
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    Returns:
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    numpy.ndarray: Accumulation/Distribution Line values
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    """
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```
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### On Balance Volume
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Cumulative volume indicator that adds volume on up days and subtracts volume on down days to measure buying and selling pressure.
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```python { .api }
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def OBV(close, volume):
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    """
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    On Balance Volume
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    Parameters:
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    - close: array-like, close prices
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    - volume: array-like, volume data
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    Returns:
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    numpy.ndarray: OBV values (cumulative volume)
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    """
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```
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### Chaikin A/D Oscillator
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Oscillator version of the Accumulation/Distribution Line, showing the momentum of accumulation/distribution.
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```python { .api }
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def ADOSC(high, low, close, volume, fastperiod=3, slowperiod=10):
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    """
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    Chaikin A/D Oscillator
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    Parameters:
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    - high: array-like, high prices
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    - low: array-like, low prices
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    - close: array-like, close prices
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    - volume: array-like, volume data
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    - fastperiod: int, fast EMA period (default: 3)
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    - slowperiod: int, slow EMA period (default: 10)
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    Returns:
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    numpy.ndarray: A/D Oscillator values
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    """
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```
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## Usage Examples
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```python
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import talib
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import numpy as np
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# Sample OHLCV data
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high = np.array([10.5, 11.0, 11.2, 10.8, 11.5])
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low = np.array([10.0, 10.3, 10.5, 10.2, 10.8])
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close = np.array([10.3, 10.8, 10.9, 10.4, 11.2])
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volume = np.array([1000, 1200, 800, 1500, 900])
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# Calculate volume indicators
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ad_line = talib.AD(high, low, close, volume)
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obv = talib.OBV(close, volume)
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ad_osc = talib.ADOSC(high, low, close, volume, fastperiod=3, slowperiod=10)
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print("A/D Line:", ad_line[-1])
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print("OBV:", obv[-1])
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print("A/D Oscillator:", ad_osc[-1])
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```