On Balance Volume

OBV measures buying and selling pressure based on volume flow.

Method

tm.ta.obv(source_close, source_volume)

Inputs

Parameter	Argument type	Description	Default Value
source_close	pd.Series	Close prices series	-
source_volume	pd.Series	Volume series	-

Outputs

Output	Type
obv	np.ndarray

Example usage

strategy.py

import tradomate as tm

@tm.strategy()
def my_strategy(config: tm.TradomateConfig, data: tm.TradomateData):

    # Trying out On Balance Volume
    obv = tm.ta.obv(data.close, data.volume)

    # Get the last value and print
    last_value = obv.iloc[-1]
    tm.log(f"Last value of On Balance Volume is {last_value}")

    # Plot the values of obv
    tm.plot(obv, title="On Balance Volume", overlay=False)