java number trend analysis library

Does there exist any simple library for identifying the patterns of series of numbers.

Basically i will get the count of trades for each client executed on each day and i am planning to store this data in influxdb now every day i need to check if the trade count is dropping or if there is a sudden increase in trade volume. If thats the case i need to raise an alert.

To achieve this i need to have a way to identify if my pattern is increasing or decreasing or if there is a sudden jump.

Can someone please suggest me any existing library for this kind of analysis