Price ROC is a technical indicator that measures the percentage change between the most recent price and the price in a specific period (“n”) in the past.
Price ROC is used to measure the rate of change or the the strength of momentum of change.
Traders often use price ROC to indicate upward or downward momentum.
Price Rate of Change in algo-trading (With Expert advisor)
Price rate of change is extremely important indicator in EA’s features. A lot of EA’s strategies use price ROC in trading, and the ability of the EA to identify the momentum can lead to high profits
Screenshot of price ROC as it looks inside the mt4 metatrader
Taken from investopedia.com
A quick video on ROC and how to read it of charts when doing technical analysis