This specific approach is detailed in an article that explains why Live momentum matters so much. The site
https://www.banglacyber.com/live-momentum-matters/ discusses how run-rate deltas, or RRR, can be a simple, effective method to track Live momentum in cricket. It explains that by computing a rolling run rate over the last three overs for each side and then noting the change from the previous rolling window, you can identify acceleration or a stall. A positive RRR suggests quick acceleration, which is a key indicator of a momentum swing and helps in discerning real momentum.