Web scraping: monitor changes to a table and web-whatsapp changes to me

In this website [login to view URL] are pages of several members, eg [login to view URL] [login to view URL] [login to view URL] In each of them, there are 2 tables titled: > [Open Trades] and > [History (9999) ] They hold new trades opened by a member and closed, respectively. I want a web scrapping program to monitor these 2 tables for changes. When new lines occur in either of them, inform me via web-whatsapp to my mobile no. Requirements for programme: > to be written in open source or freeware development platform/kit eg python or javascript > to be executed by interpreter and not needed to be compiled to binaries eg no java pls > allow me specify and monitor up 12 member pages for monitoring at any time > best to capture changes by event; otherwise, allowing me to specify a polling time (eg 5min, 8min, 15min etc) will also do > consume low bandwidth; I am going to run it in a VPS; with network quota, programme is to scrimp by downloading only the tables instead of entire webpage inclusive of graphics > treats a change to mean new record lines newly appearing in a table; a line where only column values changes does not count > when change is detected, compose a simple message and web-whatsapp ([login to view URL]) ONCE only it to a mobile no., latter to be specified > message to compose is simply <member page> <table name> <all fields of a newly detected record> Example of a simple message: Let's say changes were detected in member page [[login to view URL]]: [Open Trades] vagabond/tricky-twister-ea/2378434 11.01.2018 05:44; NZDCAD; Sell; 0.01; 0.8634; -; 119.00; -16.77; -234.00; -0.29; -0.54% [History] vagabond/tricky-twister-ea/2378434 10.25.2018 16:13; 10.26.2018 07:43; NZDCAD; Sell; 0.01; -; 60.00; 0.85540; 0.84940; 60.0; 4.50; 15h 30m; 0.12%