Rate of change ratio

ROCR measures the ratio of the current price to the price at a previous period. It is calculated as (price/prevPrice).

Method

tm.ta.rocr(source, timeperiod)

Inputs

Parameter	Argument type	Description	Default Value
source	pd.Series	Input data series	-
timeperiod	int	Number of periods for the indicator	10

Outputs

Output	Type
rocr	np.ndarray

Example usage

strategy.py

import tradomate as tm

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

    # Trying out Rate of change ratio: (price/prevPrice)
    rocr = tm.ta.rocr(data.close, timeperiod=10)

    # Get the last value and print
    last_value = rocr.iloc[-1]
    tm.log(f"Last value of Rate of change ratio: (price/prevPrice) is {last_value}")

    # Plot the values of rocr
    tm.plot(rocr, title="Rate of change ratio: (price/prevPrice)", overlay=False)