Trendlines are a way to represent some statistical data. Probability can help predict things with enough instances of an event — statistics are only a small pa

Trendlines are a way to represent some statistical data. Probability can help predict things with enough instances of an event — statistics are only a small part of how we establish a probability of a future event, and a core ingredient of even that small part is having a sufficiently representative sample (which "trendlines" usually don't). Eg. you can get statistics for all the winning lottery tickets from the last 5 years — that won't help you predict the next one. Stop confusing the two.