[feature] condition: number increase/decrease absolute/relative

[SaturnusDJ]

Version and OS
Docker 0.51.4

Describe the solution you'd like
To detect number increase and decrease, absolute (+/- x) and relative (+/- %).

Describe the use-case and give concrete real-world examples
Certain scenarios require manual evaluation (thus webpage processor). Examples are websites listing second hand items and websites listing real estate. An increase in listings is the moment to inspect, a decrease means listings are removed, and so ideally you don't get a notification for the latter. (Of course, when a list ánd remove happen between checks, you could miss it, that is the chance to take.)

[dgtlmoon]

what if theres multiple numbers on the page? i guess this would be limited to any number in the xpath/css/etc filters right?

[SaturnusDJ]

In the examples, the focus is indeed on one number by using a 'CSS/JSONPath/JQ/XPath Filter'. I do not have experience with multiple numbers being watched. What do you think?