x_Svg

x.js

var x = $$('.sparkline')[4]
  .attributes[1].nodeValue.replace('M','').split('L')
  .map(x => +x.split(',')[1])
var foll = $$(".DataPoint-info")[4].childNodes
var info = {"df": +foll[1].innerHTML,  "va": +foll[0].data}

var w = info['df'] / (x[27] - x[0])
var initial = info['va'] - info['df']
var res = [initial]
var diff = [];
for (let i in x) {
		res.push(initial + w * (x[i]-x[0] ));
		diff.push({'i':res[i] , 'j':res[i-1], 'dif':res[i] - res[i-1]})
}
// ------------------------------
console.log(diff)
var recs = $$('path.sparkline')[2].attributes[1].nodeValue.replace('M','').split('L')
  .map(x => +x.split(',')[1])
var coef = (+$$(".DataPoint-info")[2].childNodes[0].data.replace(',', '')) / recs.reduce((x, y) => x + y)
recs = recs.map(_x => +(_x*coef).toFixed())

x_svg.py

# args: delta, final 
args = 100, 500


x, y = zip(*map(eval, text.split("L")[1:]))
f = lambda arr: lambda _d, _f: lambda inp: int(((inp - arr[0]) / (arr[-1] - arr[0]) * _d) + _f - _d)
result = map(f(y)(*args), y)